US20020008065A1 - Waste and wastewater treatment and recycling system - Google Patents
Waste and wastewater treatment and recycling system Download PDFInfo
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- US20020008065A1 US20020008065A1 US09/964,311 US96431101A US2002008065A1 US 20020008065 A1 US20020008065 A1 US 20020008065A1 US 96431101 A US96431101 A US 96431101A US 2002008065 A1 US2002008065 A1 US 2002008065A1
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- wastewater treatment
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Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/002—Grey water, e.g. from clothes washers, showers or dishwashers
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/005—Black water originating from toilets
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/22—O2
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/42—Liquid level
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Definitions
- the present invention relates generally to a system for treating and recycling waste and wastewater, and more particularly to a system which separates blackwater and greywater at their respective sources, decomposes and converts the blackwater into water vapor and carbon dioxide gas, circulates, aerates, and separates the greywater into precipitated solid matter and treated water, and filters and disinfects the treated water to form recyclable and potable water.
- Wastewater generated by a household is typically classified as either blackwater or greywater.
- Blackwater includes water and organic waste drained from toilets and garbage disposals.
- Greywater includes wastewater drained from bathtubs, showers, sinks, clothes washers, and dishwashers.
- blackwater and greywater are plumbed into one single wastewater stream and directed to a septic or sewage system.
- blackwater and greywater are plumbed into one single wastewater stream and directed to a septic or sewage system.
- One aspect of the present invention provides a waste and wastewater treatment and recycling system including a waste separation system, a wastewater treatment system, and a filtration, disinfection, and water recycling system.
- the waste separation system includes a compost chamber, an air inlet, an exhaust outlet, and at least one waste inlet communicating with the compost chamber, at least one agitator positioned within the compost chamber below the at least one waste inlet, and at least one conveyor positioned within the compost chamber below the at least one agitator.
- the wastewater treatment system includes a surge chamber, an aeration chamber, and a clarification chamber communicating in-line and providing a gravity flow therethrough, a wastewater inlet communicating with the surge chamber, and a sludge removal system communicating with the compost chamber of the waste separation system and at least one of the surge, aeration, and clarification chambers.
- the filtration, disinfection, and water recycling system includes a holding chamber, a treated wastewater inlet communicating with the holding chamber and the clarification chamber of the wastewater treatment system, a filter array communicating with and in-line after the holding chamber, a disinfection system communicating with and in-line after the holding chamber, and a reservoir communicating with and in-line after the disinfection system.
- a monitoring system is operatively associated with at least one of the waste separation system, the wastewater treatment system, and the filtration, disinfection, and water recycling system.
- the monitoring system includes a plurality of sensors operatively associated with at least one of the waste separation system, the wastewater treatment system, and the filtration, disinfection, and water recycling system, and a control unit operatively associated with the plurality of sensors.
- the control unit receives a plurality of input signals from the plurality of sensors, processes the input signals, and issues a plurality of command output signals to at least one of the waste separation system, the wastewater treatment system, and the filtration, disinfection, and water recycling system.
- the waste separation system includes a compost chamber, and at least one of the plurality of sensors monitors at least one of a temperature in the compost chamber, a quantity of airflow through the compost chamber, and an amount of liquid collected within the compost chamber.
- the wastewater treatment system includes a surge-chamber, an aeration chamber, and a clarification chamber communicating in-line, and at least one of the plurality of sensors monitors at least one of a level of water within the surge, aeration, and clarification chambers, and a quantity of dissolved oxygen within the surge, aeration, and clarification chambers.
- the filtration, disinfection, and water recycling system includes a holding chamber, a filter array communicating with the holding chamber, a disinfection system communicating with the filter array, and a reservoir communicating with the disinfection system, and at least one of the plurality of sensors monitors at least one of a pressure of the filter array, operation of the disinfection system, and a level of water within at least one of the holding chamber and the reservoir.
- Yet another aspect of the present invention provides a method of treating and recycling waste and wastewater including blackwater and greywater.
- the method includes the steps of transporting the blackwater to a waste separation system, decomposing the blackwater into water vapor and gas the waste separation system, transporting the greywater to a wastewater treatment system, circulating, aerating, and separating the greywater into precipitated solid matter and treated water within the wastewater treatment system, transferring the precipitated solid matter from the wastewater treatment system to the waste separation system, transferring the treated water from the wastewater treatment system to a filtration, disinfection, and water recycling system, and filtering and disinfecting the treated water within the filtration, disinfection, and water recycling system to form recyclable water.
- the method further includes the steps of transferring the recyclable water to a membrane filtration system, and passing the recyclable water through the membrane filtration system to form potable water. In one embodiment, the method further includes the step of passing the potable water through a filter array including at least one of a microfilter and a charcoal filter. In one embodiment, the method further includes the step of monitoring at least one of the waste separation system, the wastewater treatment system, and the filtration, disinfection, and water recycling system.
- FIG. 1 is a schematic view of a waste and wastewater treatment and recycling system according to the present invention
- FIG. 2 is a schematic view of a waste separation system of the waste and wastewater treatment and recycling system of FIG. 1;
- FIGS. 3A and 3B are schematic views of a wastewater treatment system of the waste and wastewater treatment and recycling system of FIG. 1;
- FIG. 4 is a schematic view of a filtration, disinfection, and water recycling system of the waste and wastewater treatment and recycling system of FIG. 1;
- FIG. 5 is a schematic view of a monitoring system of the waste and wastewater treatment and recycling system of FIG. 1.
- FIG. 1 illustrates one embodiment of a waste and wastewater treatment and recycling system 10 according to the present invention.
- System 10 includes a waste separation system 100 , a wastewater treatment system 200 , a filtration, disinfection, and water recycling system 300 , and a monitoring system 400 .
- System 10 separates, treats, and recycles organic waste 12 and wastewater 14 , in the form of blackwater and greywater, respectively, into environmentally benign and safe-for-recycle end-products.
- Blackwater is defined to include human toilet and kitchen organic wastes
- greywater is defined to include wastewater which has been used for domestic activities such as personal hygiene, clothes washing, and dishwashing.
- system 10 is configured for use in a dwelling 20 which includes a first group of appliances which generate greywater and a second group of appliances which generate blackwater.
- the first group of appliances includes, for example, a bathtub and/or shower 22 , a sink 24 , a dishwashing machine 26 , and a clothes washing machine 28 .
- the second group of appliances includes, for example, toilets 30 a and 30 b, and a garbage disposal 32 .
- toilets 30 a and 30 b, and a garbage disposal 32 are plumbed separately from bathtub and/or shower 22 , sink 24 , dishwashing machine 26 , and clothes washing machine 28 .
- blackwater and greywater are separated at each of their respective sources.
- system 10 does not commingle blackwater with greywater.
- toilets 30 a and 30 b utilize little or no water for flushing, and garbage disposal 32 incorporates a water-conserving faucet and sink arrangement.
- Toilet 30 a for example, is a waterless or low water-use gravity flush-type toilet and toilet 30 b, for example, is a vacuum flush-type toilet.
- An example of toilet 30 a is a Traveler 500, 900, or 2000 series toilet manufactured by SeaLand Technology, Inc. or a STW series Pearl Foam Flush-Type toilet manufactured by Nepon and an example of toilet 30 b is a 500, 800, or 1000 series Vacu-Flush toilet manufactured by SeaLand Technology, Inc.
- system 10 Since system 10 essentially establishes a closed-loop, zero discharge system, dwelling 20 includes a cistern 40 which forms a backup reservoir 42 .
- Backup reservoir 42 supplies additional water to system 10 to makeup for water lost from drinking, cooking, toilet flushing, and/or delivery of organic waste 12 to waste separation system 100 .
- cistern 40 collects rainwater via conduit 44 , and/or receives water from a well or municipal source via conduit 45 .
- Pre-filters 46 and 47 are provided in conduits 44 and 45 , respectively, for filtering the water before entering backup reservoir 42 .
- Valves 48 and 49 are provided in conduits 44 and 45 , respectively, for communicating conduits 44 and 45 with backup reservoir 42 .
- Valves 48 and 49 each include a sensing device 48 a and 49 a, respectively, which senses a level of water within cistern 40 and opens or closes valves 48 and 49 accordingly.
- Cistern 40 communicates with wastewater treatment system 200 via a conduit 50 such that water from backup reservoir 42 is combined with wastewater 14 .
- a check valve 52 is provided in conduit 50 to prevent backflow of water through conduit 50 .
- a pump 54 communicates with conduit 50 and draws water from backup reservoir 42 to add water to the closed-loop, zero discharge system.
- system 10 is illustrated for use in dwelling 20 , it is within the scope of the present invention for system 10 to be a self-contained system which is portable and/or capable of being buried in a vault. In addition, it is also within the scope of the present invention for system 10 to be used in marine and space environments wherein discharge of blackwater and/or greywater is not environmentally acceptable.
- waste separation system 100 includes a composting vessel 110 , at least one organic waste agitator 130 , at least one compost conveyor 140 , and a liquid distribution system 150 .
- Waste separation system 100 facilitates aerobic decomposition and composting of organic waste 12 transported thereto. Aerobic decomposition is defined to include decomposition in the presence of air and oxygen.
- composting vessel 110 is a single or double-walled, insulated vessel and defines a compost chamber 112 which receives and decomposes organic waste 12 into primarily water vapor and carbon dioxide gas. In addition to water vapor and carbon dioxide gas, a relatively small volume of decomposed material, which can be readily handled, for example, as a garden fertilizer or the like, is also produced.
- Compost chamber 112 includes an upper waste receiving volume 112 a which receives organic waste 12 , a central mixing and aeration volume 112 b in which organic waste 12 is mixed and aerated, and a lower composting and compost collection volume 112 c wherein decomposed material eventually settles.
- Organic waste 12 includes discharge from a variety of components, including toilets 30 a and 30 b, and garbage disposal 32 , as well as other organic materials such as leaves, paper, garbage, and/or wood shavings or the like. It is, however, within the scope of the present invention for waste separation system 100 to handle biological waste materials from sources other than those enumerated.
- composting vessel 110 includes an upper section 114 and a lower section 116 .
- Upper section 114 and lower section 116 are joined together at mating flanges 114 a and 116 a, respectively, to form compost chamber 112 .
- Upper section 114 includes a top wall 114 b and a pair of side walls 114 c
- lower section 116 includes a bottom wall 116 b and a pair of side walls 116 c.
- One of the side walls 114 c of upper section 114 has an opening 114 d defined therein in which an openable and/or removable hatch 115 is fitted. Opening and/or removal of hatch 115 facilitates access to compost chamber 112 for maintenance, charging with bulk organic material, and/or removal of decomposed material.
- composting vessel 110 facilitates transport and assembly.
- a size of upper and lower sections 114 and 116 varies depending primarily on an amount of organic waste 12 to be processed by system 10 .
- composting vessel 110 is illustrated as being of rectangular shape, it is within the scope of the present invention for composting vessel 110 to be cylindrical in shape.
- composting vessel 110 includes a perforated basket 118 suspended above bottom wall 116 b of lower section 116 and spaced from sidewalls 116 c of lower section 116 .
- perforated basket 118 includes a perforated floor 118 a and perforated sidewalls (not shown).
- Perforated basket 118 facilitates aeration of organic waste 12 disposed within compost chamber 112 by permitting air to flow under, through, and around organic waste 12 . Since perforated basket 118 is suspended within compost chamber 112 , air circulation occurs throughout lower composting and compost collection volume 112 c and central mixing and aeration volume 112 b.
- water and/or other liquids accompanying organic waste 12 drain through perforated floor 118 a to bottom wall 116 b for removal by liquid distribution system 150 , as described below.
- Composting vessel 110 has an air inlet 120 , an exhaust outlet 122 and at least one waste inlet 124 defined therein.
- Air inlet 120 , exhaust outlet 122 , and waste inlet 124 each communicate with compost chamber 112 .
- air inlet 120 , exhaust outlet 122 , and waste inlet 124 are each formed in top wall 114 b of upper section 114 .
- an exhaust fan 126 communicates with exhaust outlet 122 .
- compost chamber 112 is divided by a front baffle 128 and a rear baffle 129 such that exhaust outlet 122 is separated from air inlet 120 by front baffle 128 .
- Front baffle 128 is spaced from bottom wall 116 b of lower section 116 to facilitate airflow thereunder.
- Front baffle 128 includes a door 128 a which facilitates access to innermost portions of composting vessel 110 , including upper waste receiving volume 112 a and central mixing and aeration volume 112 b.
- Rear baffle 129 has a lower opening 129 a and an upper opening 129 b defined therein which facilitate airflow therethrough.
- Exhaust fan 126 draws air in air inlet 120 , through compost chamber 112 , and out exhaust outlet 122 such that air flows, as illustrated by arrows 101 , along front baffle 128 , under front baffle 128 , through, under, and around perforated basket 118 , through and under perforated floor 118 a, through lower and upper openings 129 a and 129 b, respectively, and out exhaust outlet 122 .
- waste inlet 124 includes a toilet waste inlet 124 a, a kitchen waste inlet 124 b, and a sludge inlet 124 c.
- Toilet waste inlet 124 a communicates with toilets 30 a and 30 b via conduits 34 a and 34 b (FIG. 1), respectively, kitchen waste inlet 124 b communicates with garbage disposal 32 via a conduit 36 (FIG. 1), and sludge inlet 124 c communicates with wastewater treatment system 200 , as described below, via a conduit 38 (FIG. 1).
- conduits 34 a, 34 b, 36 , and 38 are preferably formed of polyvinylchloride (PVC), although it is within the scope of the present invention for various other natural and synthetic pipe compositions known to those skilled in the art to be employed.
- PVC polyvinylchloride
- Agitator 130 is positioned within compost chamber 112 below waste inlet 124 and upper waste receiving volume 112 a in central mixing and aeration volume 112 b.
- agitator 130 is an elongated rod 132 which includes a plurality of tines 134 protruding radially therefrom. Tines 134 are spaced along a length of elongated rod 132 in an offset manner so as to be oriented in a noncoplanar arrangement around elongated rod 132 .
- Elongated rod 132 is rotatably mounted within composting vessel 110 and rotated by a motor 136 .
- tines 134 agitate and mix organic waste 12 disposed within central mixing and aeration volume 112 b of compost chamber 112 . Such mixing facilitates aerobic biological decomposition of organic waste 12 . While elongated rod 132 is illustrated as being rotated by motor 126 , it is within the scope of the present invention for elongated rod 132 to be rotated by a hand.
- Conveyor 140 is positioned within compost chamber 112 below agitator 130 and central mixing and aeration volume 112 b in lower composting and compost collection volume 112 c above perforated floor 118 a. Conveyor 140 facilitates removal of decomposed material derived from organic waste 12 and collected within lower composting and compost collection volume 112 c by transferring decomposed material to a compost collection area 142 formed along bottom wall 116 b of lower section 116 .
- conveyor 140 is a screw-type auger 144 rotatably mounted within composting vessel 110 .
- auger 144 is rotated by, for example, a mechanical arrangement and/or hand, to transfer decomposed material collected within lower composting and compost collection volume 112 c to compost collection area 142 . Thereafter, decomposed material is removed from composting vessel 110 by access through opening 114 d.
- water and/or other liquids may be transported into compost chamber 112 through, for example, waste inlet 124 . These liquids will tend to settle toward bottom wall 116 b of lower section 116 and collect within a liquid collection area 152 formed along bottom wall 116 b. Since perforated floor 118 a is suspended above bottom wall 116 b, perforated floor 118 a allows liquid to pass through organic waste 12 to liquid collection area 152 . As such, liquid distribution system 150 disperses and/or evaporates liquid collected within liquid collection area 152 .
- Liquid distribution system 150 includes a liquid circulation arrangement 154 , a liquid dispersion system 156 , and a liquid evaporation system 158 .
- liquid circulation arrangement 154 includes a pump 160 communicating with liquid collection area 152 and a distribution conduit 162 communicating with pump 160 to form a liquid distribution flow path.
- Pump 160 includes a sensing device 161 which activates and deactivates pump 160 , according to a level of liquid collected within liquid collection area 152 , to draw liquid from liquid collection area 152 .
- bottom wall 116 b is illustrated as being flat, it is within the scope of the present invention for bottom wall 116 b to include a slanted or recessed portion which directs liquid into liquid collection area 152 for dispersion and/or evaporation by liquid distribution system 150 .
- Liquid dispersion system 156 maintains a moist environment throughout compost chamber 112 so as to facilitate biological processes which lead to decomposition.
- liquid dispersion system 156 includes a dispersion conduit 164 communicating with distribution conduit 162 and a dispersion arrangement 166 communicating with dispersion conduit 164 .
- a valve 165 is provided in dispersion conduit 164 to selectively direct liquid through dispersion conduit 164 to dispersion arrangement 166 .
- dispersion arrangement 166 includes an aperture or a plurality of apertures in the form of a nozzle 167 which communicates with dispersion conduit 164 .
- a plurality of apertures or nozzles 167 are positioned above agitator 130 and central mixing and aeration volume 112 b so as to disperse collected liquid, under pressure, throughout upper waste receiving volume 112 a and into central mixing and aeration volume 112 b.
- liquid dispersion system 156 ensures that organic waste 12 does not dry out to an extent likely to inhibit decomposition.
- Liquid evaporation system 158 dissipates liquid collected within liquid collection area 152 .
- liquid evaporation system 158 includes an evaporation conduit 170 communicating with distribution conduit 162 and an evaporation arrangement 172 communicating with evaporation conduit 170 .
- a valve 171 is provided in evaporation conduit 170 to selectively direct liquid through evaporation conduit 170 to evaporation arrangement 172 .
- evaporation arrangement 172 includes an aperture or nozzle 173 communicating with evaporation conduit 170 .
- Aperture or nozzle 173 communicates with exhaust outlet 122 so as to disperse collected liquid, under pressure, into exhaust outlet 122 .
- dispersed liquid comes into contact and is carried out of composting vessel 110 with air that is drawn through exhaust outlet 122 by exhaust fan 126 .
- liquid dispersion system 156 and liquid evaporation system 158 disperse and/or evaporate liquid that does collect within liquid collection area 152 . Should an excessive amount of liquid collect within liquid collection area 152 , liquid circulation arrangement 154 directs liquid outwardly from composting vessel 110 .
- a control unit 180 controls operation of exhaust fan 126 , motor 136 and agitator 130 , and pump 160 . It is, however, within the scope of the present invention for control unit 180 to also control conveyor 140 and valves 165 and 171 . In addition, a service light 182 is provided within composting vessel 110 .
- Composting vessel 110 is initially charged with a large volume of wood shavings, soil, leaves, paper, and/or other organic material, including microbial material, for establishing decomposition. Over time, additional organic material is added to these initial charges through door 128 a and from, for example, toilets 30 a and 30 b, and garbage disposal 32 . After an extended period of time, during which there is an occasional mixing of composting material and/or addition of further nutrient and/or charging material to composting vessel 110 to facilitate aerobic processes therein, a substantial amount of substantially decomposed material collects in lower composting and compost collection volume 112 c of compost chamber 112 .
- conveyor 140 is operated to discharge decomposed material to compost collection area 142 , wherefrom it is readily removed.
- initial operation of composting vessel 110 may be for several years before a first discharge operation is necessary.
- agitator 130 need only be turned gently every few months or so, for efficient operation.
- wastewater treatment system 200 includes a surge tank 210 , an aeration tank 220 , a clarification tank 230 , an extended aeration system 240 , and a sludge removal system 280 .
- Surge tank 210 , aeration tank 220 , and clarification tank 230 define a surge chamber 212 , an aeration chamber 222 , and a clarification chamber 232 , respectively.
- surge tank 210 , aeration tank 220 , and clarification tank 230 each have an inlet 210 a, 220 a, 230 a, respectively, and an outlet 210 b, 220 b, 230 b, respectively, defined therein.
- surge tank 210 aeration tank 220 , and clarification tank 230 each have a sloped floor 210 c, 220 c, and 230 c, respectively. It is, however, within the scope of the present invention for surge tank 210 , aeration tank 220 , and clarification tank 230 to each have a flat floor.
- inlet 210 a of surge tank 210 communicates with a drain of bathtub and/or shower 22 , a drain of sink 24 , a drain of dishwashing machine 26 , and a drain of clothes washing machine 28 via a conduit 39 (FIG. 1);
- inlet 210 a constitutes a wastewater inlet of wastewater treatment system 200 .
- Outlet 210 b of surge tank 210 communicates with inlet 220 a of aeration tank 220 via a conduit 214 and outlet 220 b of aeration tank 220 communicates with inlet 230 a of clarification tank 230 via a conduit 224 .
- outlet 230 b of clarification tank 230 communicates with filtration, disinfection, and water recycling system 300 , as described below, via a conduit 234 .
- outlet 230 b constitutes a treated water outlet or effluent line of wastewater treatment system 200 .
- surge tank 210 , aeration tank 220 , and clarification tank 230 communicate in-line so as to provide gravity flow of water therethrough.
- conduit 234 is positioned lower than conduit 224
- conduit 224 is positioned lower than conduit 214
- conduit 214 is positioned lower than conduit 39 .
- Conduit 224 includes an extension 224 a extending downward into aeration chamber 222 to prevent direct through-flow of water between aeration tank 220 and clarification tank 230 .
- conduit 234 includes an extension 234 a extending downward into clarification chamber 232 to prevent direct through-flow of water between clarification tank 230 and filtration, disinfection, and water recycling system 300 .
- a filter 236 is provided in extension 234 a to filter water passing through conduit 234 to filtration, disinfection, and water recycling system 300 .
- An example of filter 236 is an Al 800 filter manufactured by Zabel.
- extended aeration system 240 includes an air delivery system 242 and an airflow array 244 for water circulation, distribution, and aeration within and amongst surge tank 210 , aeration tank 220 , and clarification tank 230 .
- air delivery system 242 includes a pump 246 and a valve arrangement 248 .
- Pump 246 generates a supply of pressurized air and valve arrangement 248 includes a plurality of valves 249 which provide selective delivery and adjustment of pressurized air to airflow array 244 .
- airflow array 244 includes an airlift 250 communicating with surge chamber 212 , an airlift 254 communicating with aeration chamber 222 , an airlift 258 communicating with clarification chamber 232 , and an airlift 262 communicating with surge chamber 212 .
- airflow array 244 includes an air diffuser 270 communicating with surge chamber 212 and an air diffuser 274 communicating with aeration chamber 222 .
- Airlifts 250 , 254 , 258 , and 262 , as well as air diffusers 270 and 274 are air assisted systems which facilitate water circulation, distribution, and aeration within and amongst surge tank 210 , aeration tank 220 , and clarification tank 230 .
- Airlifts 250 , 254 , 258 , and 262 provide circulation and distribution of water within and amongst surge tank 210 , aeration tank 220 , and clarification tank 230 .
- Airlift 250 includes an air delivery conduit 251 communicating with one of the valves 249 and an airlift conduit 252 communicating with air delivery conduit 251 .
- Airlift conduit 252 extends into surge chamber 212 so as to draw water from a bottom portion of surge chamber 212 and redistribute the water to a top portion of surge chamber 212 as illustrated by arrows 253 .
- airlift 252 circulates water contained within surge tank 210 .
- Airlift 254 includes an air delivery conduit 255 communicating with one of the valves 249 and an airlift conduit 256 communicating with air delivery conduit 255 .
- Air lift conduit 255 extends into aeration chamber 222 so as to draw water from a bottom portion of aeration chamber 222 and redistribute the water to a top portion of aeration chamber 222 as illustrated by arrows 257 .
- Airlift 254 circulates water contained within aeration tank 220 .
- Airlift 258 includes an air delivery conduit 259 communicating with one of the valves 249 and an airlift conduit 260 communicating with air delivery conduit 259 .
- Airlift conduit 260 extends into clarification chamber 232 so as to draw water from a bottom portion of clarification chamber 232 and redistribute the water to the top portion of surge chamber 212 as illustrated by arrows 261 .
- Airlift 258 returns settled solids back to surge tank 210 for additional treatment.
- Airlift 262 includes an air delivery conduit 263 communicating with one of the valves 249 and an airlift conduit 264 communicating with air delivery conduit 263 .
- Airlift conduit 264 extends into surge chamber 212 so as to draw water from above the bottom portion of surge chamber 212 and redistribute the water to the top portion of aeration chamber 222 as illustrated by arrows 265 .
- airlift 262 maintains a lower level of water in surge tank 210 than in aeration tank 220 .
- Air diffusers 270 and 274 provide aeration of water contained within surge tank 210 and aeration tank 220 , respectively.
- Air diffuser 270 includes an air delivery conduit 271 communicating with one of the valves 249 and a diffuser head 272 provided at an end of air delivery conduit 271 .
- Diffuser head 272 is submerged within surge chamber 212 so as to aerate water contained therein.
- air diffuser 270 provides oxygen for aerobic biological treatment of water contained within surge tank 210 .
- Air diffuser 274 includes an air delivery conduit 275 communicating with one of the valves 249 and a diffuser head 276 provided at an end of air delivery conduit 275 .
- Diffuser head 276 is submerged within aeration chamber 222 so as to aerate water contained therein.
- air diffuser 274 provides oxygen for aerobic biological treatment of water contained within aeration tank 220 .
- wastewater 14 separates into treated water and precipitated solid matter, in the form of sludge, which collects along a bottom portion of surge chamber 212 , a bottom portion of aeration chamber 222 , and a bottom portion of clarification chamber 232 .
- sludge removal system 280 transfers sludge from surge tank 210 , aeration tank 220 , and clarification tank 230 to waste separation system 100 for decomposition.
- sludge removal system 280 includes a conduit 282 which communicates with a bottom portion of surge chamber 212 , a bottom portion of aeration chamber 222 , and a bottom portion of clarification chamber 232 to transfer sludge from wastewater treatment system 200 to waste separation system 100 .
- conduit 282 includes a sludge pick-up 282 a extending downward toward a center of sloped floor 210 c of surge tank 210 , a sludge pick-up 282 b extending downward toward a center of sloped floor 220 c of aeration tank 220 , and a sludge pick-up 282 c extending downward toward a center of sloped floor 230 c of clarification tank 230 .
- a pump 284 communicates with conduit 282 and draws sludge from the bottom portion of surge chamber 212 as illustrated by arrows 283 a, the bottom portion of aeration chamber 222 as illustrated by arrows 283 b, and the bottom portion of clarification chamber 232 as illustrated by arrows 283 c.
- Valves 286 a, 286 b, and 286 c are provided in sludge pick-ups 282 a, 282 b, and 282 c, respectively, to selectively control removal of sludge from surge tank 210 , aeration tank 220 , and clarification tank 230 .
- conduit 282 communicates with sludge inlet 124 c of composting vessel 110 (FIG. 2) to discharge sludge into upper waste receiving volume 112 a of compost chamber 112 for decomposition.
- wastewater treatment system 200 includes a media 290 disposed within surge tank 210 and aeration tank 220 .
- Media 290 is submerged within surge chamber 212 and aeration chamber 222 to provide additional surface area to support aerobic bacterial growth.
- media 290 includes a plurality of balls 292 formed of porous plastic material.
- An example of media 290 is plastic packing manufactured by Jaeger under the tradename Tri-Packs(TM) or Lantec under the tradename Q-PAC(TM).
- wastewater treatment system 200 also includes a perforated member 294 positioned within surge tank 210 and aeration tank 220 . Perforated member 294 is positioned above media 290 to disperse water circulated within surge chamber 212 and aeration chamber 222 .
- filtration, disinfection, and water recycling system 300 includes a holding tank 310 , a filter array 320 , a disinfection system 330 , a holding tank 340 , a membrane filtration system 350 , a holding tank 360 , and a post-filter array 370 .
- filtration, disinfection, and water recycling system 300 also includes a continuous circulation system 380 , a recyclable water discharge system 388 , and a back flushing system 394 .
- Holding tank 310 defines a holding chamber 312 for treated water transferred from wastewater treatment system 200 .
- Holding tank 310 includes an inlet 310 a and an outlet 310 b each communicating with holding chamber 312 .
- Inlet 310 a communicates with outlet 230 b of clarification tank 230 via conduit 234 (FIG. 3A), and outlet 310 b communicates with filter array 320 via a conduit 316 .
- a pump 318 communicates with conduit 316 and draws treated water from holding tank 310 in response to system demands.
- a sensing device 319 is disposed within holding tank 310 for sensing a level of treated water disposed therein.
- a pressure tank 317 communicates with conduit 316 for maintaining pressure and flow of treated water within conduit 316 .
- Filter array 320 is provided in-line after holding tank 310 for purifying treated water discharged from holding tank 310 .
- filter array 320 includes a sediment filter 322 and a viral and bacterial filter 324 .
- sediment filter 322 , and viral and bacterial filter 324 remove impurities for example, dirt and suspended solids, and cryptosporidium and giardia cysts, respectively, from treated water passing therethrough.
- sediment filter 322 is a 20-micron filter
- viral and bacterial filter 324 is a 1-micron filter.
- sediment filter 322 is a PP-BB-20-1 filter manufactured by Harmsco or a RD1 ceramic filter manufactured by Marathon Ceramics and an example of viral and bacterial filter 324 is a PP-D-1 filter manufactured by Harmsco.
- Filter array 320 communicates with and supplies filtered water to disinfection system 330 via a conduit 326 .
- a check valve 328 is provided in conduit 326 to prevent backflow of filtered water through conduit 326 .
- Disinfection system 330 is provided in-line after holding tank 310 and filter array 320 for disinfecting filtered water passed through filter array 320 .
- disinfection system 330 includes an ultra-violet light disinfection unit 332 .
- disinfection unit 332 disinfects filtered water passing therethrough by subjecting the water to ultra-violet light.
- An example of disinfection unit 332 is an HS-10 Disinfection System manufactured by Germ Free Water, Inc. It is, however, within the scope of the present invention for disinfection system 330 to include an ozone or chlorine disinfection unit.
- Disinfection system 330 communicates with and supplies filtered and disinfected water to holding tank 340 via a conduit 334 .
- Holding tank 340 defines a holding chamber 342 for filtered and disinfected water. By filtering and disinfecting treated water, filter array 320 and disinfection system 330 produce recyclable water. As such, holding chamber 342 forms a reservoir for recyclable water.
- Holding tank 340 includes an inlet 340 a and an outlet 340 b each communicating with holding chamber 342 . Inlet 340 a communicates with conduit 334 leading from disinfection system 330 and outlet 340 b communicates with membrane filtration system 350 via a conduit 344 .
- a pump 346 communicates with conduit 344 and draws filtered and disinfected water from holding tank 340 in response to system demands.
- a sensing device 347 is disposed within holding tank 340 for sensing a level of filtered and disinfected water disposed therein.
- a pressure tank 345 communicates with conduit 344 for maintaining pressure and flow of filtered and disinfected water within conduit 344 .
- Membrane filtration system 350 is provided in-line after holding tank 310 , filter array 320 , and disinfection system 330 forproviding potable water.
- membrane filtration system 350 includes a reverse osmosis unit 352 provided in-line after holding tank 340 .
- reverse osmosis unit 352 provides potable water by forcing water through a membrane filter and removing salts and minerals.
- An example of reverse osmosis unit 352 is a WM-180-ROF reverse osmosis system manufactured by Premier.
- Membrane filtration system 350 communicates with holding tank 360 such that water that passes through reverse osmosis unit 352 is transferred to holding tank 360 via a conduit 354 .
- Water that does not pass through reverse osmosis unit 352 is returned to surge tank 210 of wastewater treatment system 200 (FIG. 3B) via a bypass conduit 356 for dilution and treatment.
- a check valve 358 is provided in conduit 356 to prevent backflow of bypass water through conduit 356 .
- Holding tank 360 defines a holding chamber 362 for potable water.
- Holding tank 360 includes an inlet 360 a and an outlet 360 b each communicating with holding chamber 362 .
- Inlet 360 a communicates with conduit 354 leading from membrane filtration system 350 and outlet 360 b communicates with post-filter array 370 via a conduit 364 .
- a pump 366 communicates with conduit 364 and draws potable water from holding tank 360 in response to system demands.
- a sensing device 367 is disposed within holding tank 360 for sensing a level of potable water disposed therein.
- a pressure tank 365 communicates with conduit 364 for maintaining pressure and flow of potable water within conduit 364 .
- Post-filter array 370 is provided in-line after membrane filtration system 350 and holding tank 360 for improving taste and removing odor from potable water discharged from holding tank 360 .
- post-filter array 370 includes a microfilter 372 and a charcoal filter 374 .
- microfilter 372 and charcoal filter 374 remove, for example, sulfur and chlorine residual from potable water passing therethrough.
- An example of microfilter 372 is a PP-20-0.2-DOE filter manufactured by Harmsco and an example of charcoal filter 374 is a HC-90-AC-5 filter manufactured by Harmsco.
- an output conduit 376 leading from post-filter array 370 communicates with and is adapted to supply potable water to, for example, toilets 30 a and 30 b, bathtub and/or shower 22 , sink 24 , dishwashing machine 26 , and clothes washing machine 28 .
- sensing device 319 disposed within holding tank 310 , senses the level of treated water and activates pump 318 when the level exceeds a first predetermined level and activates pump 54 when the level falls below a second predetermined level.
- Sensing device 347 disposed within holding tank 340 , senses the level of filtered and disinfected water and activates pump 384 when the level is above a predetermined level.
- Sensing device 367 disposed within holding tank 360 , senses the level of potable water and activates pump 346 when the level falls below a predetermined level.
- holding tanks 310 , 340 , and 360 each include an overflow outlet 310 c, 340 c, and 360 c, respectively.
- overflow outlets 310 c , 340 c, and 360 c communicate with holding chambers 312 , 342 , and 362 , respectively, and discharge overflow water.
- filtration, disinfection, and water recycling system 300 includes a continuous circulation arrangement 380 .
- Continuous circulation arrangement 380 includes a circulation conduit 382 communicating with both holding tank 360 and disinfection system 330 .
- a pump 384 communicates with circulation conduit 382 and draws filtered and disinfected water from holding tank 360 to provide continuous circulation of filtered and disinfected water through disinfection system 330 .
- a check valve 386 is provided in circulation conduit 382 to prevent backflow of filtered and disinfected water through circulation conduit 382 .
- a valve 387 is provided in circulation conduit 382 to selectively circulate filtered and disinfected water through circulation conduit 382 .
- Valve 387 includes, for example, a manual valve or an automated valve.
- filtration, disinfection, and water recycling system 300 includes a discharge arrangement 388 .
- Discharge arrangement 388 includes a discharge conduit 390 communicating with holding tank 360 (via circulation conduit 382 ).
- Pump 384 communicates with discharge conduit 390 (via circulation conduit 382 ) to draw filtered and disinfected water from holding tank 360 .
- a valve 392 is provided in discharge conduit 390 to selectively discharge filtered and disinfected water through discharge conduit 390 .
- Valve 392 includes, for example, a manual valve or an automated valve.
- filtration, disinfection, and water recycling system 300 includes a back flushing system 394 .
- Back flushing system 394 includes a back flushing conduit 396 communicating with output conduit 376 .
- Back flushing conduit 396 communicates with filter array 320 for reverse flow therethrough.
- back flushing conduit 396 communicates in-line with viral and bacterial filter 324 and sediment filter 322 .
- a valve 398 is provided in back flushing conduit 396 before filter array 320 to selectively discharge potable water through back flushing conduit 396 .
- Valve 392 includes, for example, a manual valve or an automated valve.
- a check valve 399 is provided in back flushing conduit 396 after filter array 320 to prevent backflow of water to filter array 320 .
- Back flushing conduit 396 communicates with inlet 210 a of surge tank 210 via conduit 39 (FIG. 3B) to discharge backflushing water into wastewater treatment system 200 .
- monitoring system 400 monitors and/or controls operation of waste separation system 100 , operation of wastewater treatment system 200 , and operation of filtration, disinfection, and water recycling system 300 .
- monitoring system 400 includes a plurality of sensors 410 monitoring operation of waste separation system 100 , a plurality of sensors 420 monitoring operation of wastewater treatment system 200 , and a plurality of sensors 430 monitoring operation of filtration, disinfection, and water recycling system 300 .
- monitoring system 400 includes a control unit 450 which receives input signals from sensors 410 , 420 , and 430 , processes the input signals, and issues command output signals to waste separation system 100 , wastewater treatment system 200 , and filtration, disinfection, and water recycling system 300 , accordingly.
- control unit 450 receives input signals from sensors 410 , 420 , and 430 , processes the input signals, and issues command output signals to waste separation system 100 , wastewater treatment system 200 , and filtration, disinfection, and water recycling system 300 , accordingly.
- sensors 410 which monitor operation of waste separation system 100 include a sensor 411 for monitoring a temperature in compost chamber 112 , a sensor 412 for monitoring a quantity of airflow through exhaust outlet 122 , a sensor 413 for monitoring operation of exhaust fan 126 , a sensor 414 for monitoring cycling of pump 160 , a sensor 415 for monitoring operation of pump 160 , a sensor 416 for monitoring operation of motor 136 , and a sensor 417 for monitoring an amount of liquid collected within composting vessel 110 .
- Signals from sensors 411 , 412 , 413 , 414 , 415 , 416 , and 417 are input to control unit 450 via a signal line 410 a.
- sensor 411 measures temperature and humidity within compost chamber 112
- sensor 412 measures cubic feet per minute (cfm) of air movement
- sensor 413 measures electrical current consumed and potential malfunction of exhaust fan 126
- sensor 414 measures number of cycles pump 160 was turned on and potential malfunction of sensing device 161
- sensor 415 measures electrical current consumed and potential malfunction of pump 160
- sensor 416 measures electrical current consumed and potential malfunction of motor 136
- sensor 417 measures high water level and potential malfunction of pump 160 and/or sensing device 161 .
- sensors 420 which monitor operation of wastewater treatment system 200 include a sensor 422 for monitoring operation of pump 246 , a sensor 424 for monitoring a level of water in surge tank 210 a sensor 425 for monitoring a quantity of dissolved oxygen in surge tank 210 , a sensor 426 for monitoring a level of water in aeration tank 220 a sensor 427 for monitoring a quantity of dissolved oxygen in aeration tank 220 , a sensor 428 for monitoring a level of water in clarification tank 230 , and a sensor 429 for monitoring a quantity of dissolved oxygen in clarification tank 230 .
- a signal from sensor 422 is input to control unit 450 via a signal line 420 a and signals from sensors 424 , 425 , 426 , 427 , 428 , and 429 are input to control unit 450 via a signal line 420 b.
- sensor 422 measures electrical current consumed and potential malfunction of air compressor 246 , sensors 424 , 426 , and 428 measure high water level, and sensors 425 , 427 , and 429 measure dissolved oxygen levels.
- sensors 430 which monitor operation of filtration, disinfection, and water recycling system 300 include a sensor 431 a for monitoring a level of water within holding tank 310 , a sensor 431 b for monitoring operation of pump 318 , a sensor 432 a for monitoring a level of water within holding tank 340 , a sensor 432 b for monitoring operation of pump 346 , a sensor 433 a for monitoring a level of water within holding tank 360 , and a sensor 433 b for monitoring operation of pump 366 .
- Sensors 430 also include a sensor 434 a for monitoring a pressure gauge 323 of sediment filter 322 , a sensor 434 b for monitoring a pressure gauge 325 of viral and bacterial filter 324 , a sensor 435 for monitoring operation of disinfection system 330 , a sensor 436 a for monitoring a pressure gauge 353 a of membrane filtration system 350 , a sensor 436 b for monitoring a pressure gauge 353 b of membrane filtration system 350 , a sensor 437 a for monitoring a pressure gauge 373 of microfilter 372 , a sensor 437 b for monitoring a pressure gauge 375 of charcoal filter 374 , and a sensor 438 for monitoring operation of pump 384 . Signals from sensors 434 a, 434 b, 435 , 436 a, 436
- sensor 431 a measures liquid level and number of cycles pump was turned on
- sensor 431 b measures electrical current consumed and potential malfunction of pump 318
- sensor 432 a measures liquid level and number of cycles pump was turned on
- sensor 432 a in the high position would open valve 392 and turn on pump 384 if water is to be discharged instead of being directed to membrane filtration system 350
- sensor 432 b measures electrical current consumed and potential malfunction of pump 346
- sensor 433 a measures liquid level and number of cycles pump was turned on
- sensor 433 b measures electrical current consumed and potential malfunction of pump 366
- sensors 434 a and 434 b measure pressure after filters 322 and 324 , respectively, and determine when pressure drops below a prescribed amount from pressure and tank to turn off pump 318 , open valve 398 for predetermined time to back flush the system, close valve 398 , and then turn pump 318 back on.
- sensor 436 a measures pressure after a first filter of membrane filtration system 350 and determines when pressure drops below line pressure from pressure tank and pump indicating a need to remove and change the first filter
- sensor 436 b measures pressure after a second filter of membrane filtration system 350 and determines when pressure drops below line pressure from pressure tank and pump indicating a need to remove and change the second filter
- sensor 437 a measures pressure after filter 373 and determines when pressure drops below line pressure from pressure tank and pump indicating a need to remove and change filter 373
- sensor 437 b measures pressure after filter 374 and determines when pressure drops below line pressure from pressure tank and pump indicating a need to remove and change filter 374
- sensor 438 measures electrical current consumed and potential malfunction of pump 384 .
- control unit 450 receives signals from a sensor 402 which monitors operation of pump 54 , a sensor 404 which monitors operation of valve 48 , and a sensor 405 which monitors operation of valve 49 . In addition, control unit 450 receives signals indicative of a position of valves 387 , 392 , and 398 .
- sensor 402 measures electrical current consumed and potential pump malfunction
- sensor 404 measures flow and water level in reservoir 42 from roof water supply system
- sensor 405 measures flow and water level in reservoir 42 from city or well water supply system.
- Control unit 450 receives input signals from sensors 410 , 420 , 430 , 402 , 404 , and 405 , and input signals indicative of valve positions. Thus, control unit 450 processes the input signals and monitors various parameters of waste separation system 100 , wastewater treatment system 200 , and filtration, disinfection, and water recycling system 300 . In response to system demands, including system malfunctions, control unit 450 issues command output signals to waste separation system 100 , wastewater treatment system 200 , and filtration, disinfection, and water recycling system 300 , accordingly. In one embodiment, control unit 450 communicates with a central monitoring and processing center (not shown). As such, control unit 450 is monitored and receives operational commands from the central monitoring and processing center. An example of control unit 450 is Tele-Controller Monitoring System manufactured by QuadTech.
- waste and wastewater treatment and recycling system 10 separates blackwater and greywater at each of their respective sources and treats these two wastewater streams individually.
- toilets 30 a and 30 b , and a garbage disposal 32 are plumbed separately from bathtub and/or shower 22 , sink 24 , dishwashing machine 26 , and clothes washing machine 28 , .
- blackwater is transported to waste separation system 100 and greywater is transported to wastewater treatment system 200 .
- blackwater is decomposed into water vapor and carbon dioxide gas.
- greywater is circulated, aerated, and separated into precipitated solid matter and treated water.
- precipitated solid matter is transferred from wastewater treatment system 200 to waste separation system 100 for decomposition and treated water is transferred from wastewater treatment system 200 to filtration, disinfection, and water recycling system 300 .
- treated water is filtered and disinfected to form recyclable and potable water.
- monitoring system 400 monitors and controls operation of waste separation system 100 , wastewater treatment system 200 , and filtration, disinfection, and water recycling system 300 .
- waste and wastewater treatment and recycling system 10 essentially establishes a closed-loop, zero discharge waste and wastewater treatment and recycling system.
- waste separation system 100 employs aerobic and/or vermiculture decomposition processes to decompose human toilet and kitchen organic wastes 12
- wastewater treatment system 200 treats and separates wastewater 14
- filtration, disinfection, and water recycling system 300 filters, disinfects, stores, and delivers upon demand potable water for entire reuse including cooking, drinking, and personal hygiene
- monitoring system 400 monitors, documents, controls, and shuts down system 10 in response to system demands and/or malfunctions.
- the present invention ensures that organic wastes and wastewater from both streams are converted to environmentally benign and safe-for-recycle end-products.
- a monitoring system collects data, controls operations, reports any operational discrepancies, and shuts down the processing systems in case of a malfunction.
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Abstract
Description
- The present invention relates generally to a system for treating and recycling waste and wastewater, and more particularly to a system which separates blackwater and greywater at their respective sources, decomposes and converts the blackwater into water vapor and carbon dioxide gas, circulates, aerates, and separates the greywater into precipitated solid matter and treated water, and filters and disinfects the treated water to form recyclable and potable water.
- Wastewater generated by a household is typically classified as either blackwater or greywater. Blackwater includes water and organic waste drained from toilets and garbage disposals. Greywater includes wastewater drained from bathtubs, showers, sinks, clothes washers, and dishwashers. Typically, blackwater and greywater are plumbed into one single wastewater stream and directed to a septic or sewage system. By combining blackwater and greywater into one single wastewater stream, however, the entire wastewater stream must be treated as blackwater. Because water pollution and water availability have become increasingly important both nationally and internationally, numerous attempts have been made to treat organic waste and wastewater to acceptable levels and standards for reuse. Such attempts, however, have not produced environmentally benign and safe-for-recycle end-products.
- Accordingly, a need exists for a system which separates blackwater and greywater at their respective sources and treats these two wastewater streams individually within separate processing systems to ensure that organic waste and wastewater from both streams are converted into environmentally benign and safe-for-recycle end-products.
- One aspect of the present invention provides a waste and wastewater treatment and recycling system including a waste separation system, a wastewater treatment system, and a filtration, disinfection, and water recycling system. The waste separation system includes a compost chamber, an air inlet, an exhaust outlet, and at least one waste inlet communicating with the compost chamber, at least one agitator positioned within the compost chamber below the at least one waste inlet, and at least one conveyor positioned within the compost chamber below the at least one agitator. The wastewater treatment system includes a surge chamber, an aeration chamber, and a clarification chamber communicating in-line and providing a gravity flow therethrough, a wastewater inlet communicating with the surge chamber, and a sludge removal system communicating with the compost chamber of the waste separation system and at least one of the surge, aeration, and clarification chambers. The filtration, disinfection, and water recycling system includes a holding chamber, a treated wastewater inlet communicating with the holding chamber and the clarification chamber of the wastewater treatment system, a filter array communicating with and in-line after the holding chamber, a disinfection system communicating with and in-line after the holding chamber, and a reservoir communicating with and in-line after the disinfection system. In one embodiment, a monitoring system is operatively associated with at least one of the waste separation system, the wastewater treatment system, and the filtration, disinfection, and water recycling system.
- Another aspect of the present invention provides a monitoring system for a waste and wastewater treatment and recycling system. The monitoring system includes a plurality of sensors operatively associated with at least one of the waste separation system, the wastewater treatment system, and the filtration, disinfection, and water recycling system, and a control unit operatively associated with the plurality of sensors. The control unit receives a plurality of input signals from the plurality of sensors, processes the input signals, and issues a plurality of command output signals to at least one of the waste separation system, the wastewater treatment system, and the filtration, disinfection, and water recycling system.
- In one embodiment, the waste separation system includes a compost chamber, and at least one of the plurality of sensors monitors at least one of a temperature in the compost chamber, a quantity of airflow through the compost chamber, and an amount of liquid collected within the compost chamber. In one embodiment, the wastewater treatment system includes a surge-chamber, an aeration chamber, and a clarification chamber communicating in-line, and at least one of the plurality of sensors monitors at least one of a level of water within the surge, aeration, and clarification chambers, and a quantity of dissolved oxygen within the surge, aeration, and clarification chambers. In one embodiment, the filtration, disinfection, and water recycling system includes a holding chamber, a filter array communicating with the holding chamber, a disinfection system communicating with the filter array, and a reservoir communicating with the disinfection system, and at least one of the plurality of sensors monitors at least one of a pressure of the filter array, operation of the disinfection system, and a level of water within at least one of the holding chamber and the reservoir.
- Yet another aspect of the present invention provides a method of treating and recycling waste and wastewater including blackwater and greywater. The method includes the steps of transporting the blackwater to a waste separation system, decomposing the blackwater into water vapor and gas the waste separation system, transporting the greywater to a wastewater treatment system, circulating, aerating, and separating the greywater into precipitated solid matter and treated water within the wastewater treatment system, transferring the precipitated solid matter from the wastewater treatment system to the waste separation system, transferring the treated water from the wastewater treatment system to a filtration, disinfection, and water recycling system, and filtering and disinfecting the treated water within the filtration, disinfection, and water recycling system to form recyclable water. In one embodiment, the method further includes the steps of transferring the recyclable water to a membrane filtration system, and passing the recyclable water through the membrane filtration system to form potable water. In one embodiment, the method further includes the step of passing the potable water through a filter array including at least one of a microfilter and a charcoal filter. In one embodiment, the method further includes the step of monitoring at least one of the waste separation system, the wastewater treatment system, and the filtration, disinfection, and water recycling system.
- FIG. 1 is a schematic view of a waste and wastewater treatment and recycling system according to the present invention;
- FIG. 2 is a schematic view of a waste separation system of the waste and wastewater treatment and recycling system of FIG. 1;
- FIGS. 3A and 3B are schematic views of a wastewater treatment system of the waste and wastewater treatment and recycling system of FIG. 1;
- FIG. 4 is a schematic view of a filtration, disinfection, and water recycling system of the waste and wastewater treatment and recycling system of FIG. 1; and
- FIG. 5 is a schematic view of a monitoring system of the waste and wastewater treatment and recycling system of FIG. 1.
- In the following detailed description of the preferred embodiments, reference is made to the accompanying drawings which form a part hereof, and in which is shown by way of illustration specific embodiments in which the invention may be practiced. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present invention. The following detailed description, therefore, is not to be taken in a limiting sense, and the scope of the present invention is defined by the appended claims.
- FIG. 1 illustrates one embodiment of a waste and wastewater treatment and
recycling system 10 according to the present invention.System 10 includes awaste separation system 100, awastewater treatment system 200, a filtration, disinfection, andwater recycling system 300, and amonitoring system 400.System 10 separates, treats, and recyclesorganic waste 12 andwastewater 14, in the form of blackwater and greywater, respectively, into environmentally benign and safe-for-recycle end-products. Blackwater is defined to include human toilet and kitchen organic wastes, and greywater is defined to include wastewater which has been used for domestic activities such as personal hygiene, clothes washing, and dishwashing. - In one embodiment,
system 10 is configured for use in adwelling 20 which includes a first group of appliances which generate greywater and a second group of appliances which generate blackwater. The first group of appliances includes, for example, a bathtub and/orshower 22, asink 24, adishwashing machine 26, and aclothes washing machine 28. The second group of appliances includes, for example, toilets 30 a and 30 b, and agarbage disposal 32. As such, toilets 30 a and 30 b, and agarbage disposal 32 are plumbed separately from bathtub and/orshower 22,sink 24,dishwashing machine 26, andclothes washing machine 28. By separately plumbing the first group of appliances and the second group of appliances, blackwater and greywater are separated at each of their respective sources. Thus,system 10 does not commingle blackwater with greywater. - In an illustrative embodiment, toilets 30 a and 30 b utilize little or no water for flushing, and
garbage disposal 32 incorporates a water-conserving faucet and sink arrangement. Toilet 30 a, for example, is a waterless or low water-use gravity flush-type toilet and toilet 30 b, for example, is a vacuum flush-type toilet. An example of toilet 30 a is a Traveler 500, 900, or 2000 series toilet manufactured by SeaLand Technology, Inc. or a STW series Pearl Foam Flush-Type toilet manufactured by Nepon and an example of toilet 30 b is a 500, 800, or 1000 series Vacu-Flush toilet manufactured by SeaLand Technology, Inc. - Since
system 10 essentially establishes a closed-loop, zero discharge system,dwelling 20 includes acistern 40 which forms abackup reservoir 42.Backup reservoir 42 supplies additional water tosystem 10 to makeup for water lost from drinking, cooking, toilet flushing, and/or delivery oforganic waste 12 towaste separation system 100. In one embodiment,cistern 40 collects rainwater viaconduit 44, and/or receives water from a well or municipal source viaconduit 45. Pre-filters 46 and 47 are provided in 44 and 45, respectively, for filtering the water before enteringconduits backup reservoir 42. 48 and 49 are provided inValves 44 and 45, respectively, for communicatingconduits 44 and 45 withconduits backup reservoir 42. 48 and 49 each include a sensing device 48 a and 49 a, respectively, which senses a level of water withinValves cistern 40 and opens or closes 48 and 49 accordingly.valves Cistern 40 communicates withwastewater treatment system 200 via aconduit 50 such that water frombackup reservoir 42 is combined withwastewater 14. Acheck valve 52 is provided inconduit 50 to prevent backflow of water throughconduit 50. Apump 54 communicates withconduit 50 and draws water frombackup reservoir 42 to add water to the closed-loop, zero discharge system. - While
system 10 is illustrated for use indwelling 20, it is within the scope of the present invention forsystem 10 to be a self-contained system which is portable and/or capable of being buried in a vault. In addition, it is also within the scope of the present invention forsystem 10 to be used in marine and space environments wherein discharge of blackwater and/or greywater is not environmentally acceptable. - As illustrated in FIG. 2,
waste separation system 100 includes acomposting vessel 110, at least oneorganic waste agitator 130, at least onecompost conveyor 140, and aliquid distribution system 150.Waste separation system 100 facilitates aerobic decomposition and composting oforganic waste 12 transported thereto. Aerobic decomposition is defined to include decomposition in the presence of air and oxygen. In one embodiment,composting vessel 110 is a single or double-walled, insulated vessel and defines acompost chamber 112 which receives and decomposesorganic waste 12 into primarily water vapor and carbon dioxide gas. In addition to water vapor and carbon dioxide gas, a relatively small volume of decomposed material, which can be readily handled, for example, as a garden fertilizer or the like, is also produced. -
Compost chamber 112 includes an upper waste receiving volume 112 a which receivesorganic waste 12, a central mixing and aeration volume 112 b in whichorganic waste 12 is mixed and aerated, and a lower composting and compost collection volume 112 c wherein decomposed material eventually settles.Organic waste 12 includes discharge from a variety of components, including toilets 30 a and 30 b, andgarbage disposal 32, as well as other organic materials such as leaves, paper, garbage, and/or wood shavings or the like. It is, however, within the scope of the present invention forwaste separation system 100 to handle biological waste materials from sources other than those enumerated. - In one embodiment,
composting vessel 110 includes anupper section 114 and alower section 116.Upper section 114 andlower section 116 are joined together at mating flanges 114 a and 116 a, respectively, to formcompost chamber 112.Upper section 114 includes a top wall 114 b and a pair of side walls 114 c, andlower section 116 includes a bottom wall 116 b and a pair of side walls 116 c. One of the side walls 114 c ofupper section 114 has an opening 114 d defined therein in which an openable and/orremovable hatch 115 is fitted. Opening and/or removal ofhatch 115 facilitates access tocompost chamber 112 for maintenance, charging with bulk organic material, and/or removal of decomposed material. Formation ofcomposting vessel 110 from upper and 114 and 116, respectively, facilitates transport and assembly. In addition, a size of upper andlower sections 114 and 116, respectively, varies depending primarily on an amount oflower sections organic waste 12 to be processed bysystem 10. Whilecomposting vessel 110 is illustrated as being of rectangular shape, it is within the scope of the present invention forcomposting vessel 110 to be cylindrical in shape. - In one embodiment,
composting vessel 110 includes aperforated basket 118 suspended above bottom wall 116 b oflower section 116 and spaced from sidewalls 116 c oflower section 116. In one embodiment,perforated basket 118 includes a perforated floor 118 a and perforated sidewalls (not shown).Perforated basket 118 facilitates aeration oforganic waste 12 disposed withincompost chamber 112 by permitting air to flow under, through, and aroundorganic waste 12. Sinceperforated basket 118 is suspended withincompost chamber 112, air circulation occurs throughout lower composting and compost collection volume 112 c and central mixing and aeration volume 112 b. In addition, water and/or other liquids accompanyingorganic waste 12 drain through perforated floor 118 a to bottom wall 116 b for removal byliquid distribution system 150, as described below. -
Composting vessel 110 has anair inlet 120, anexhaust outlet 122 and at least onewaste inlet 124 defined therein.Air inlet 120,exhaust outlet 122, andwaste inlet 124 each communicate withcompost chamber 112. In one embodiment,air inlet 120,exhaust outlet 122, andwaste inlet 124 are each formed in top wall 114 b ofupper section 114. In addition, anexhaust fan 126 communicates withexhaust outlet 122. Furthermore,compost chamber 112 is divided by afront baffle 128 and arear baffle 129 such thatexhaust outlet 122 is separated fromair inlet 120 byfront baffle 128.Front baffle 128 is spaced from bottom wall 116 b oflower section 116 to facilitate airflow thereunder.Front baffle 128 includes a door 128 a which facilitates access to innermost portions ofcomposting vessel 110, including upper waste receiving volume 112 a and central mixing and aeration volume 112 b.Rear baffle 129 has a lower opening 129 a and an upper opening 129 b defined therein which facilitate airflow therethrough. -
Exhaust fan 126 draws air inair inlet 120, throughcompost chamber 112, and outexhaust outlet 122 such that air flows, as illustrated byarrows 101, alongfront baffle 128, underfront baffle 128, through, under, and aroundperforated basket 118, through and under perforated floor 118 a, through lower and upper openings 129 a and 129 b, respectively, and outexhaust outlet 122. As such, air flows beneath, around, and through lower composting and compost collection volume 112 c, central mixing and aeration volume 112 b, and upper waste receiving volume 112 a to aeratecompost chamber 112 and disperse water vapor and carbon dioxide gases generated withincomposting vessel 110 during decomposition to the atmosphere. - In one embodiment,
waste inlet 124 includes a toilet waste inlet 124 a, a kitchen waste inlet 124 b, and a sludge inlet 124 c. Toilet waste inlet 124 a communicates with toilets 30 a and 30 b via conduits 34 a and 34 b (FIG. 1), respectively, kitchen waste inlet 124 b communicates withgarbage disposal 32 via a conduit 36 (FIG. 1), and sludge inlet 124 c communicates withwastewater treatment system 200, as described below, via a conduit 38 (FIG. 1). Whilewaste inlet 124 is illustrated as communicating with toilets 30 a and 30 b, andgarbage disposal 32, it is within the scope of the present invention for any arrangement and/or number of sources to provideorganic waste 12 towaste separation system 100. In addition, 34 a, 34 b, 36, and 38, as well as all other conduits described herein, are preferably formed of polyvinylchloride (PVC), although it is within the scope of the present invention for various other natural and synthetic pipe compositions known to those skilled in the art to be employed.conduits -
Agitator 130 is positioned withincompost chamber 112 belowwaste inlet 124 and upper waste receiving volume 112 a in central mixing and aeration volume 112 b. In one embodiment,agitator 130 is anelongated rod 132 which includes a plurality oftines 134 protruding radially therefrom.Tines 134 are spaced along a length ofelongated rod 132 in an offset manner so as to be oriented in a noncoplanar arrangement aroundelongated rod 132.Elongated rod 132 is rotatably mounted withincomposting vessel 110 and rotated by amotor 136. As such,tines 134 agitate and mixorganic waste 12 disposed within central mixing and aeration volume 112 b ofcompost chamber 112. Such mixing facilitates aerobic biological decomposition oforganic waste 12. Whileelongated rod 132 is illustrated as being rotated bymotor 126, it is within the scope of the present invention forelongated rod 132 to be rotated by a hand. -
Conveyor 140 is positioned withincompost chamber 112 belowagitator 130 and central mixing and aeration volume 112 b in lower composting and compost collection volume 112 c above perforated floor 118 a.Conveyor 140 facilitates removal of decomposed material derived fromorganic waste 12 and collected within lower composting and compost collection volume 112 c by transferring decomposed material to acompost collection area 142 formed along bottom wall 116 b oflower section 116. In one embodiment,conveyor 140 is a screw-type auger 144 rotatably mounted withincomposting vessel 110. As such,auger 144 is rotated by, for example, a mechanical arrangement and/or hand, to transfer decomposed material collected within lower composting and compost collection volume 112 c tocompost collection area 142. Thereafter, decomposed material is removed from compostingvessel 110 by access through opening 114 d. - During selected uses, water and/or other liquids may be transported into
compost chamber 112 through, for example,waste inlet 124. These liquids will tend to settle toward bottom wall 116 b oflower section 116 and collect within aliquid collection area 152 formed along bottom wall 116 b. Since perforated floor 118 a is suspended above bottom wall 116 b, perforated floor 118 a allows liquid to pass throughorganic waste 12 toliquid collection area 152. As such,liquid distribution system 150 disperses and/or evaporates liquid collected withinliquid collection area 152. -
Liquid distribution system 150 includes aliquid circulation arrangement 154, aliquid dispersion system 156, and aliquid evaporation system 158. In one embodiment,liquid circulation arrangement 154 includes apump 160 communicating withliquid collection area 152 and adistribution conduit 162 communicating withpump 160 to form a liquid distribution flow path.Pump 160 includes asensing device 161 which activates and deactivatespump 160, according to a level of liquid collected withinliquid collection area 152, to draw liquid fromliquid collection area 152. While bottom wall 116 b is illustrated as being flat, it is within the scope of the present invention for bottom wall 116 b to include a slanted or recessed portion which directs liquid intoliquid collection area 152 for dispersion and/or evaporation byliquid distribution system 150. -
Liquid dispersion system 156 maintains a moist environment throughoutcompost chamber 112 so as to facilitate biological processes which lead to decomposition. In one embodiment,liquid dispersion system 156 includes adispersion conduit 164 communicating withdistribution conduit 162 and adispersion arrangement 166 communicating withdispersion conduit 164. Avalve 165 is provided indispersion conduit 164 to selectively direct liquid throughdispersion conduit 164 todispersion arrangement 166. In one embodiment,dispersion arrangement 166 includes an aperture or a plurality of apertures in the form of anozzle 167 which communicates withdispersion conduit 164. A plurality of apertures ornozzles 167 are positioned aboveagitator 130 and central mixing and aeration volume 112 b so as to disperse collected liquid, under pressure, throughout upper waste receiving volume 112 a and into central mixing and aeration volume 112 b. Thus,liquid dispersion system 156 ensures thatorganic waste 12 does not dry out to an extent likely to inhibit decomposition. -
Liquid evaporation system 158 dissipates liquid collected withinliquid collection area 152. In one embodiment,liquid evaporation system 158 includes anevaporation conduit 170 communicating withdistribution conduit 162 and anevaporation arrangement 172 communicating withevaporation conduit 170. Avalve 171 is provided inevaporation conduit 170 to selectively direct liquid throughevaporation conduit 170 toevaporation arrangement 172. In one embodiment,evaporation arrangement 172 includes an aperture or nozzle 173 communicating withevaporation conduit 170. Aperture or nozzle 173 communicates withexhaust outlet 122 so as to disperse collected liquid, under pressure, intoexhaust outlet 122. Thus, dispersed liquid comes into contact and is carried out ofcomposting vessel 110 with air that is drawn throughexhaust outlet 122 byexhaust fan 126. - It is noted that relatively little water is to be used with
waste separation system 100, and that large volumes of free-standing water are generally avoided in composting arrangements. Thus,liquid dispersion system 156 andliquid evaporation system 158 disperse and/or evaporate liquid that does collect withinliquid collection area 152. Should an excessive amount of liquid collect withinliquid collection area 152,liquid circulation arrangement 154 directs liquid outwardly fromcomposting vessel 110. - In one embodiment, a
control unit 180 controls operation ofexhaust fan 126,motor 136 andagitator 130, and pump 160. It is, however, within the scope of the present invention forcontrol unit 180 to also controlconveyor 140 and 165 and 171. In addition, avalves service light 182 is provided withincomposting vessel 110. -
Composting vessel 110 is initially charged with a large volume of wood shavings, soil, leaves, paper, and/or other organic material, including microbial material, for establishing decomposition. Over time, additional organic material is added to these initial charges through door 128 a and from, for example, toilets 30 a and 30 b, andgarbage disposal 32. After an extended period of time, during which there is an occasional mixing of composting material and/or addition of further nutrient and/or charging material tocomposting vessel 110 to facilitate aerobic processes therein, a substantial amount of substantially decomposed material collects in lower composting and compost collection volume 112 c ofcompost chamber 112. After that time, and periodically from then on,conveyor 140 is operated to discharge decomposed material tocompost collection area 142, wherefrom it is readily removed. In a typical operation with one toilet and one garbage disposal, initial operation ofcomposting vessel 110 may be for several years before a first discharge operation is necessary. During such time,agitator 130 need only be turned gently every few months or so, for efficient operation. - As illustrated in FIGS. 3A and 3B,
wastewater treatment system 200 includes asurge tank 210, anaeration tank 220, aclarification tank 230, anextended aeration system 240, and asludge removal system 280.Surge tank 210,aeration tank 220, andclarification tank 230 define asurge chamber 212, anaeration chamber 222, and aclarification chamber 232, respectively. In one embodiment,surge tank 210,aeration tank 220, andclarification tank 230 each have an inlet 210 a, 220 a, 230 a, respectively, and an outlet 210 b, 220 b, 230 b, respectively, defined therein. In addition,surge tank 210,aeration tank 220, andclarification tank 230 each have a sloped floor 210 c, 220 c, and 230 c, respectively. It is, however, within the scope of the present invention forsurge tank 210,aeration tank 220, andclarification tank 230 to each have a flat floor. - In one embodiment, inlet 210 a of
surge tank 210 communicates with a drain of bathtub and/orshower 22, a drain ofsink 24, a drain ofdishwashing machine 26, and a drain ofclothes washing machine 28 via a conduit 39 (FIG. 1); Thus, inlet 210 a constitutes a wastewater inlet ofwastewater treatment system 200. Outlet 210 b ofsurge tank 210 communicates with inlet 220 a ofaeration tank 220 via aconduit 214 and outlet 220 b ofaeration tank 220 communicates with inlet 230 a ofclarification tank 230 via aconduit 224. In addition, outlet 230 b ofclarification tank 230 communicates with filtration, disinfection, andwater recycling system 300, as described below, via aconduit 234. Thus, outlet 230 b constitutes a treated water outlet or effluent line ofwastewater treatment system 200. - In one embodiment,
surge tank 210,aeration tank 220, andclarification tank 230 communicate in-line so as to provide gravity flow of water therethrough. Thus,conduit 234 is positioned lower thanconduit 224,conduit 224 is positioned lower thanconduit 214, andconduit 214 is positioned lower thanconduit 39.Conduit 224, however, includes an extension 224 a extending downward intoaeration chamber 222 to prevent direct through-flow of water betweenaeration tank 220 andclarification tank 230. In addition,conduit 234 includes an extension 234 a extending downward intoclarification chamber 232 to prevent direct through-flow of water betweenclarification tank 230 and filtration, disinfection, andwater recycling system 300. In one embodiment, afilter 236 is provided in extension 234 a to filter water passing throughconduit 234 to filtration, disinfection, andwater recycling system 300. An example offilter 236 is an Al 800 filter manufactured by Zabel. - As illustrated in FIG. 3A,
extended aeration system 240 includes anair delivery system 242 and anairflow array 244 for water circulation, distribution, and aeration within and amongstsurge tank 210,aeration tank 220, andclarification tank 230. In one embodiment,air delivery system 242 includes apump 246 and avalve arrangement 248.Pump 246 generates a supply of pressurized air andvalve arrangement 248 includes a plurality ofvalves 249 which provide selective delivery and adjustment of pressurized air toairflow array 244. In one embodiment,airflow array 244 includes anairlift 250 communicating withsurge chamber 212, anairlift 254 communicating withaeration chamber 222, anairlift 258 communicating withclarification chamber 232, and anairlift 262 communicating withsurge chamber 212. In addition,airflow array 244 includes anair diffuser 270 communicating withsurge chamber 212 and anair diffuser 274 communicating withaeration chamber 222. 250, 254, 258, and 262, as well asAirlifts 270 and 274 are air assisted systems which facilitate water circulation, distribution, and aeration within and amongstair diffusers surge tank 210,aeration tank 220, andclarification tank 230. -
250, 254, 258, and 262 provide circulation and distribution of water within and amongstAirlifts surge tank 210,aeration tank 220, andclarification tank 230.Airlift 250 includes anair delivery conduit 251 communicating with one of thevalves 249 and anairlift conduit 252 communicating withair delivery conduit 251. Airliftconduit 252 extends intosurge chamber 212 so as to draw water from a bottom portion ofsurge chamber 212 and redistribute the water to a top portion ofsurge chamber 212 as illustrated byarrows 253. Thus,airlift 252 circulates water contained withinsurge tank 210.Airlift 254 includes anair delivery conduit 255 communicating with one of thevalves 249 and anairlift conduit 256 communicating withair delivery conduit 255.Air lift conduit 255 extends intoaeration chamber 222 so as to draw water from a bottom portion ofaeration chamber 222 and redistribute the water to a top portion ofaeration chamber 222 as illustrated byarrows 257. Thus,airlift 254 circulates water contained withinaeration tank 220.Airlift 258 includes anair delivery conduit 259 communicating with one of thevalves 249 and anairlift conduit 260 communicating withair delivery conduit 259. Airliftconduit 260 extends intoclarification chamber 232 so as to draw water from a bottom portion ofclarification chamber 232 and redistribute the water to the top portion ofsurge chamber 212 as illustrated byarrows 261. Thus, airlift 258 returns settled solids back tosurge tank 210 for additional treatment.Airlift 262 includes anair delivery conduit 263 communicating with one of thevalves 249 and anairlift conduit 264 communicating withair delivery conduit 263. Airliftconduit 264 extends intosurge chamber 212 so as to draw water from above the bottom portion ofsurge chamber 212 and redistribute the water to the top portion ofaeration chamber 222 as illustrated byarrows 265. Thus,airlift 262 maintains a lower level of water insurge tank 210 than inaeration tank 220. -
270 and 274 provide aeration of water contained withinAir diffusers surge tank 210 andaeration tank 220, respectively.Air diffuser 270 includes anair delivery conduit 271 communicating with one of thevalves 249 and adiffuser head 272 provided at an end ofair delivery conduit 271.Diffuser head 272 is submerged withinsurge chamber 212 so as to aerate water contained therein. Thus,air diffuser 270 provides oxygen for aerobic biological treatment of water contained withinsurge tank 210.Air diffuser 274 includes anair delivery conduit 275 communicating with one of thevalves 249 and adiffuser head 276 provided at an end ofair delivery conduit 275.Diffuser head 276 is submerged withinaeration chamber 222 so as to aerate water contained therein. Thus,air diffuser 274 provides oxygen for aerobic biological treatment of water contained withinaeration tank 220. - During circulation, distribution, and aeration of water within and amongst
surge tank 210,aeration tank 220, andclarification tank 230,wastewater 14 separates into treated water and precipitated solid matter, in the form of sludge, which collects along a bottom portion ofsurge chamber 212, a bottom portion ofaeration chamber 222, and a bottom portion ofclarification chamber 232. Thus,sludge removal system 280 transfers sludge fromsurge tank 210,aeration tank 220, andclarification tank 230 towaste separation system 100 for decomposition. - As illustrated in FIG. 3B,
sludge removal system 280 includes aconduit 282 which communicates with a bottom portion ofsurge chamber 212, a bottom portion ofaeration chamber 222, and a bottom portion ofclarification chamber 232 to transfer sludge fromwastewater treatment system 200 towaste separation system 100. As such,conduit 282 includes a sludge pick-up 282 a extending downward toward a center of sloped floor 210 c ofsurge tank 210, a sludge pick-up 282 b extending downward toward a center of sloped floor 220 c ofaeration tank 220, and a sludge pick-up 282 c extending downward toward a center of sloped floor 230 c ofclarification tank 230. Apump 284 communicates withconduit 282 and draws sludge from the bottom portion ofsurge chamber 212 as illustrated by arrows 283 a, the bottom portion ofaeration chamber 222 as illustrated by arrows 283 b, and the bottom portion ofclarification chamber 232 as illustrated by arrows 283 c. Valves 286 a, 286 b, and 286 c are provided in sludge pick-ups 282 a, 282 b, and 282 c, respectively, to selectively control removal of sludge fromsurge tank 210,aeration tank 220, andclarification tank 230. In one embodiment,conduit 282 communicates with sludge inlet 124 c of composting vessel 110 (FIG. 2) to discharge sludge into upper waste receiving volume 112 a ofcompost chamber 112 for decomposition. - In one embodiment,
wastewater treatment system 200 includes amedia 290 disposed withinsurge tank 210 andaeration tank 220.Media 290 is submerged withinsurge chamber 212 andaeration chamber 222 to provide additional surface area to support aerobic bacterial growth. In one embodiment,media 290 includes a plurality ofballs 292 formed of porous plastic material. An example ofmedia 290 is plastic packing manufactured by Jaeger under the tradename Tri-Packs(TM) or Lantec under the tradename Q-PAC(TM). In addition,wastewater treatment system 200 also includes aperforated member 294 positioned withinsurge tank 210 andaeration tank 220.Perforated member 294 is positioned abovemedia 290 to disperse water circulated withinsurge chamber 212 andaeration chamber 222. - As illustrated in FIG. 4, filtration, disinfection, and
water recycling system 300 includes aholding tank 310, afilter array 320, adisinfection system 330, aholding tank 340, amembrane filtration system 350, aholding tank 360, and apost-filter array 370. In one embodiment, filtration, disinfection, andwater recycling system 300 also includes acontinuous circulation system 380, a recyclablewater discharge system 388, and aback flushing system 394. -
Holding tank 310 defines a holdingchamber 312 for treated water transferred fromwastewater treatment system 200.Holding tank 310 includes an inlet 310 a and an outlet 310 b each communicating with holdingchamber 312. Inlet 310 a communicates with outlet 230 b ofclarification tank 230 via conduit 234 (FIG. 3A), and outlet 310 b communicates withfilter array 320 via aconduit 316. In one embodiment, apump 318 communicates withconduit 316 and draws treated water from holdingtank 310 in response to system demands. Asensing device 319 is disposed within holdingtank 310 for sensing a level of treated water disposed therein. Apressure tank 317 communicates withconduit 316 for maintaining pressure and flow of treated water withinconduit 316. -
Filter array 320 is provided in-line after holdingtank 310 for purifying treated water discharged from holdingtank 310. In one embodiment,filter array 320 includes asediment filter 322 and a viral andbacterial filter 324. Thus,sediment filter 322, and viral andbacterial filter 324 remove impurities for example, dirt and suspended solids, and cryptosporidium and giardia cysts, respectively, from treated water passing therethrough. In one illustrative embodiment,sediment filter 322 is a 20-micron filter, and viral andbacterial filter 324 is a 1-micron filter. An example ofsediment filter 322 is a PP-BB-20-1 filter manufactured by Harmsco or a RD1 ceramic filter manufactured by Marathon Ceramics and an example of viral andbacterial filter 324 is a PP-D-1 filter manufactured by Harmsco.Filter array 320 communicates with and supplies filtered water todisinfection system 330 via aconduit 326. Acheck valve 328 is provided inconduit 326 to prevent backflow of filtered water throughconduit 326. -
Disinfection system 330 is provided in-line after holdingtank 310 andfilter array 320 for disinfecting filtered water passed throughfilter array 320. In one embodiment,disinfection system 330 includes an ultra-violetlight disinfection unit 332. Thus,disinfection unit 332 disinfects filtered water passing therethrough by subjecting the water to ultra-violet light. An example ofdisinfection unit 332 is an HS-10 Disinfection System manufactured by Germ Free Water, Inc. It is, however, within the scope of the present invention fordisinfection system 330 to include an ozone or chlorine disinfection unit.Disinfection system 330 communicates with and supplies filtered and disinfected water to holdingtank 340 via aconduit 334. -
Holding tank 340 defines a holdingchamber 342 for filtered and disinfected water. By filtering and disinfecting treated water,filter array 320 anddisinfection system 330 produce recyclable water. As such, holdingchamber 342 forms a reservoir for recyclable water.Holding tank 340 includes an inlet 340 a and an outlet 340 b each communicating with holdingchamber 342. Inlet 340 a communicates withconduit 334 leading fromdisinfection system 330 and outlet 340 b communicates withmembrane filtration system 350 via aconduit 344. In one embodiment, apump 346 communicates withconduit 344 and draws filtered and disinfected water from holdingtank 340 in response to system demands. Asensing device 347 is disposed within holdingtank 340 for sensing a level of filtered and disinfected water disposed therein. Apressure tank 345 communicates withconduit 344 for maintaining pressure and flow of filtered and disinfected water withinconduit 344. -
Membrane filtration system 350 is provided in-line after holdingtank 310,filter array 320, anddisinfection system 330 forproviding potable water. In one embodiment,membrane filtration system 350 includes areverse osmosis unit 352 provided in-line after holdingtank 340. Thus,reverse osmosis unit 352 provides potable water by forcing water through a membrane filter and removing salts and minerals. An example ofreverse osmosis unit 352 is a WM-180-ROF reverse osmosis system manufactured by Premier.Membrane filtration system 350 communicates with holdingtank 360 such that water that passes throughreverse osmosis unit 352 is transferred to holdingtank 360 via aconduit 354. Water that does not pass throughreverse osmosis unit 352, however, is returned tosurge tank 210 of wastewater treatment system 200 (FIG. 3B) via abypass conduit 356 for dilution and treatment. Acheck valve 358 is provided inconduit 356 to prevent backflow of bypass water throughconduit 356. -
Holding tank 360 defines a holdingchamber 362 for potable water.Holding tank 360 includes an inlet 360 a and an outlet 360 b each communicating with holdingchamber 362. Inlet 360 a communicates withconduit 354 leading frommembrane filtration system 350 and outlet 360 b communicates withpost-filter array 370 via aconduit 364. In one embodiment, apump 366 communicates withconduit 364 and draws potable water from holdingtank 360 in response to system demands. Asensing device 367 is disposed within holdingtank 360 for sensing a level of potable water disposed therein. Apressure tank 365 communicates withconduit 364 for maintaining pressure and flow of potable water withinconduit 364. -
Post-filter array 370 is provided in-line aftermembrane filtration system 350 and holdingtank 360 for improving taste and removing odor from potable water discharged from holdingtank 360. In one embodiment,post-filter array 370 includes amicrofilter 372 and acharcoal filter 374. Thus,microfilter 372 andcharcoal filter 374 remove, for example, sulfur and chlorine residual from potable water passing therethrough. An example ofmicrofilter 372 is a PP-20-0.2-DOE filter manufactured by Harmsco and an example ofcharcoal filter 374 is a HC-90-AC-5 filter manufactured by Harmsco. In one embodiment, anoutput conduit 376 leading frompost-filter array 370 communicates with and is adapted to supply potable water to, for example, toilets 30 a and 30 b, bathtub and/orshower 22,sink 24, dishwashingmachine 26, andclothes washing machine 28. - In one embodiment,
sensing device 319, disposed within holdingtank 310, senses the level of treated water and activates pump 318 when the level exceeds a first predetermined level and activates pump 54 when the level falls below a second predetermined level.Sensing device 347, disposed within holdingtank 340, senses the level of filtered and disinfected water and activates pump 384 when the level is above a predetermined level.Sensing device 367, disposed within holdingtank 360, senses the level of potable water and activates pump 346 when the level falls below a predetermined level. - In one embodiment, holding
310, 340, and 360 each include an overflow outlet 310 c, 340 c, and 360 c, respectively. Thus, overflow outlets 310 c, 340 c, and 360 c communicate with holdingtanks 312, 342, and 362, respectively, and discharge overflow water.chambers - In one embodiment, filtration, disinfection, and
water recycling system 300 includes acontinuous circulation arrangement 380.Continuous circulation arrangement 380 includes acirculation conduit 382 communicating with both holdingtank 360 anddisinfection system 330. Apump 384 communicates withcirculation conduit 382 and draws filtered and disinfected water from holdingtank 360 to provide continuous circulation of filtered and disinfected water throughdisinfection system 330. Acheck valve 386 is provided incirculation conduit 382 to prevent backflow of filtered and disinfected water throughcirculation conduit 382. Avalve 387 is provided incirculation conduit 382 to selectively circulate filtered and disinfected water throughcirculation conduit 382.Valve 387 includes, for example, a manual valve or an automated valve. - In one embodiment, filtration, disinfection, and
water recycling system 300 includes adischarge arrangement 388.Discharge arrangement 388 includes adischarge conduit 390 communicating with holding tank 360 (via circulation conduit 382).Pump 384 communicates with discharge conduit 390 (via circulation conduit 382) to draw filtered and disinfected water from holdingtank 360. Avalve 392 is provided indischarge conduit 390 to selectively discharge filtered and disinfected water throughdischarge conduit 390.Valve 392 includes, for example, a manual valve or an automated valve. - In one embodiment, filtration, disinfection, and
water recycling system 300 includes aback flushing system 394. Back flushingsystem 394 includes aback flushing conduit 396 communicating withoutput conduit 376. Back flushingconduit 396 communicates withfilter array 320 for reverse flow therethrough. As such, back flushingconduit 396 communicates in-line with viral andbacterial filter 324 andsediment filter 322. Avalve 398 is provided in back flushingconduit 396 beforefilter array 320 to selectively discharge potable water through back flushingconduit 396.Valve 392 includes, for example, a manual valve or an automated valve. In addition, acheck valve 399 is provided in back flushingconduit 396 afterfilter array 320 to prevent backflow of water to filterarray 320. Back flushingconduit 396 communicates with inlet 210 a ofsurge tank 210 via conduit 39 (FIG. 3B) to discharge backflushing water intowastewater treatment system 200. - As illustrated in FIGS. 2, 3A, 3B, and 5,
monitoring system 400 monitors and/or controls operation ofwaste separation system 100, operation ofwastewater treatment system 200, and operation of filtration, disinfection, andwater recycling system 300. As such,monitoring system 400 includes a plurality ofsensors 410 monitoring operation ofwaste separation system 100, a plurality ofsensors 420 monitoring operation ofwastewater treatment system 200, and a plurality ofsensors 430 monitoring operation of filtration, disinfection, andwater recycling system 300. In addition,monitoring system 400 includes acontrol unit 450 which receives input signals from 410, 420, and 430, processes the input signals, and issues command output signals tosensors waste separation system 100,wastewater treatment system 200, and filtration, disinfection, andwater recycling system 300, accordingly. - In one embodiment, as illustrated in FIG. 2,
sensors 410 which monitor operation ofwaste separation system 100 include asensor 411 for monitoring a temperature incompost chamber 112, asensor 412 for monitoring a quantity of airflow throughexhaust outlet 122, asensor 413 for monitoring operation ofexhaust fan 126, asensor 414 for monitoring cycling ofpump 160, asensor 415 for monitoring operation ofpump 160, asensor 416 for monitoring operation ofmotor 136, and asensor 417 for monitoring an amount of liquid collected withincomposting vessel 110. Signals from 411, 412, 413, 414, 415, 416, and 417 are input to controlsensors unit 450 via a signal line 410 a. - In one illustrative embodiment,
sensor 411 measures temperature and humidity withincompost chamber 112,sensor 412 measures cubic feet per minute (cfm) of air movement,sensor 413 measures electrical current consumed and potential malfunction ofexhaust fan 126,sensor 414 measures number of cycles pump 160 was turned on and potential malfunction ofsensing device 161,sensor 415 measures electrical current consumed and potential malfunction ofpump 160,sensor 416 measures electrical current consumed and potential malfunction ofmotor 136, andsensor 417 measures high water level and potential malfunction ofpump 160 and/orsensing device 161. - In one embodiment, as illustrated in FIGS. 3A and 3B,
sensors 420 which monitor operation ofwastewater treatment system 200 include asensor 422 for monitoring operation ofpump 246, asensor 424 for monitoring a level of water in surge tank 210 asensor 425 for monitoring a quantity of dissolved oxygen insurge tank 210, asensor 426 for monitoring a level of water in aeration tank 220 asensor 427 for monitoring a quantity of dissolved oxygen inaeration tank 220, asensor 428 for monitoring a level of water inclarification tank 230, and asensor 429 for monitoring a quantity of dissolved oxygen inclarification tank 230. A signal fromsensor 422 is input to controlunit 450 via a signal line 420 a and signals from 424, 425, 426, 427, 428, and 429 are input to controlsensors unit 450 via a signal line 420 b. - In one illustrative embodiment,
sensor 422 measures electrical current consumed and potential malfunction ofair compressor 246, 424, 426, and 428 measure high water level, andsensors 425, 427, and 429 measure dissolved oxygen levels.sensors - In one embodiment, as illustrated in FIG. 5,
sensors 430 which monitor operation of filtration, disinfection, andwater recycling system 300 include a sensor 431 a for monitoring a level of water within holdingtank 310, a sensor 431 b for monitoring operation ofpump 318, a sensor 432 a for monitoring a level of water within holdingtank 340, a sensor 432 b for monitoring operation ofpump 346, a sensor 433 a for monitoring a level of water within holdingtank 360, and a sensor 433 b for monitoring operation ofpump 366. Signals from sensors 431 a, 431 b, 432 a, 432 b, 433 a, and 433 b are input to controlunit 450 via a signal line 430 a.Sensors 430 also include a sensor 434 a for monitoring apressure gauge 323 ofsediment filter 322, a sensor 434 b for monitoring apressure gauge 325 of viral andbacterial filter 324, asensor 435 for monitoring operation ofdisinfection system 330, a sensor 436 a for monitoring a pressure gauge 353 a ofmembrane filtration system 350, a sensor 436 b for monitoring a pressure gauge 353 b ofmembrane filtration system 350, a sensor 437 a for monitoring apressure gauge 373 ofmicrofilter 372, a sensor 437 b for monitoring apressure gauge 375 ofcharcoal filter 374, and asensor 438 for monitoring operation ofpump 384. Signals from 434 a, 434 b, 435, 436 a, 436 b, 437 a, 437 b, and 438 are input to controlsensors unit 450 via a signal line 430 b. - In one illustrative embodiment, sensor 431 a measures liquid level and number of cycles pump was turned on, sensor 431 b measures electrical current consumed and potential malfunction of
pump 318, sensor 432 a measures liquid level and number of cycles pump was turned on, sensor 432 a in the high position would openvalve 392 and turn onpump 384 if water is to be discharged instead of being directed tomembrane filtration system 350, sensor 432 b measures electrical current consumed and potential malfunction ofpump 346, sensor 433 a measures liquid level and number of cycles pump was turned on, sensor 433 b measures electrical current consumed and potential malfunction ofpump 366, and sensors 434 a and 434 b measure pressure after 322 and 324, respectively, and determine when pressure drops below a prescribed amount from pressure and tank to turn offfilters pump 318,open valve 398 for predetermined time to back flush the system,close valve 398, and then turn pump 318 back on. In addition, sensor 436 a measures pressure after a first filter ofmembrane filtration system 350 and determines when pressure drops below line pressure from pressure tank and pump indicating a need to remove and change the first filter, sensor 436 b measures pressure after a second filter ofmembrane filtration system 350 and determines when pressure drops below line pressure from pressure tank and pump indicating a need to remove and change the second filter, sensor 437 a measures pressure afterfilter 373 and determines when pressure drops below line pressure from pressure tank and pump indicating a need to remove and changefilter 373, sensor 437 b measures pressure afterfilter 374 and determines when pressure drops below line pressure from pressure tank and pump indicating a need to remove and changefilter 374, andsensor 438 measures electrical current consumed and potential malfunction ofpump 384. - In addition,
control unit 450 receives signals from asensor 402 which monitors operation ofpump 54, asensor 404 which monitors operation ofvalve 48, and asensor 405 which monitors operation ofvalve 49. In addition,control unit 450 receives signals indicative of a position of 387, 392, and 398.valves - In one illustrative embodiment,
sensor 402 measures electrical current consumed and potential pump malfunction,sensor 404 measures flow and water level inreservoir 42 from roof water supply system, andsensor 405 measures flow and water level inreservoir 42 from city or well water supply system. -
Control unit 450 receives input signals from 410, 420, 430, 402, 404, and 405, and input signals indicative of valve positions. Thus,sensors control unit 450 processes the input signals and monitors various parameters ofwaste separation system 100,wastewater treatment system 200, and filtration, disinfection, andwater recycling system 300. In response to system demands, including system malfunctions,control unit 450 issues command output signals towaste separation system 100,wastewater treatment system 200, and filtration, disinfection, andwater recycling system 300, accordingly. In one embodiment,control unit 450 communicates with a central monitoring and processing center (not shown). As such,control unit 450 is monitored and receives operational commands from the central monitoring and processing center. An example ofcontrol unit 450 is Tele-Controller Monitoring System manufactured by QuadTech. - In operation, waste and wastewater treatment and
recycling system 10 separates blackwater and greywater at each of their respective sources and treats these two wastewater streams individually. For example, toilets 30 a and 30 b, and agarbage disposal 32 are plumbed separately from bathtub and/orshower 22,sink 24, dishwashingmachine 26, andclothes washing machine 28, . As such, blackwater is transported to wasteseparation system 100 and greywater is transported towastewater treatment system 200. Withinwaste separation system 100, blackwater is decomposed into water vapor and carbon dioxide gas. Withinwastewater treatment system 200 greywater is circulated, aerated, and separated into precipitated solid matter and treated water. Thereafter, precipitated solid matter is transferred fromwastewater treatment system 200 towaste separation system 100 for decomposition and treated water is transferred fromwastewater treatment system 200 to filtration, disinfection, andwater recycling system 300. Within filtration, disinfection, andwater recycling system 300, treated water is filtered and disinfected to form recyclable and potable water. In addition,monitoring system 400, monitors and controls operation ofwaste separation system 100,wastewater treatment system 200, and filtration, disinfection, andwater recycling system 300. - Thus, waste and wastewater treatment and
recycling system 10 essentially establishes a closed-loop, zero discharge waste and wastewater treatment and recycling system. As such,waste separation system 100 employs aerobic and/or vermiculture decomposition processes to decompose human toilet and kitchenorganic wastes 12,wastewater treatment system 200 treats and separateswastewater 14, filtration, disinfection, andwater recycling system 300 filters, disinfects, stores, and delivers upon demand potable water for entire reuse including cooking, drinking, and personal hygiene, andmonitoring system 400 monitors, documents, controls, and shuts downsystem 10 in response to system demands and/or malfunctions. - By separating blackwater and greywater at each of their respective sources, and then transporting and treating these two wastewater streams individually within separate processing systems, the present invention ensures that organic wastes and wastewater from both streams are converted to environmentally benign and safe-for-recycle end-products. To ensure that the separate processing systems operate appropriately, a monitoring system collects data, controls operations, reports any operational discrepancies, and shuts down the processing systems in case of a malfunction.
- Although specific embodiments have been illustrated and described herein for purposes of description of the preferred embodiment, it will be appreciated by those of ordinary skill in the art that a wide variety of alternate and/or equivalent implementations calculated to achieve the same purposes may be substituted for the specific embodiments shown and described without departing from the scope of the present invention.
Claims (38)
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| WO2004110935A1 (en) * | 2003-06-15 | 2004-12-23 | Ulrich Braun | Method and device for treating and recycling waste water |
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| US10138138B2 (en) | 2012-06-06 | 2018-11-27 | Canplas Industries Ltd. | System and method of greywater recovery and reuse |
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| CN110436691A (en) * | 2019-08-27 | 2019-11-12 | 南京大学 | A thermal power plant desulfurization wastewater zero-discharge treatment system and method |
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Also Published As
| Publication number | Publication date |
|---|---|
| US6299775B1 (en) | 2001-10-09 |
| US6383369B2 (en) | 2002-05-07 |
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