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WO2009130813A1 - Système de réutilisation d’un liquide usagé à base d’huile animale/végétale - Google Patents

Système de réutilisation d’un liquide usagé à base d’huile animale/végétale Download PDF

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Publication number
WO2009130813A1
WO2009130813A1 PCT/JP2008/070076 JP2008070076W WO2009130813A1 WO 2009130813 A1 WO2009130813 A1 WO 2009130813A1 JP 2008070076 W JP2008070076 W JP 2008070076W WO 2009130813 A1 WO2009130813 A1 WO 2009130813A1
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WIPO (PCT)
Prior art keywords
waste liquid
animal
vegetable oil
water
liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2008/070076
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English (en)
Japanese (ja)
Inventor
茂 坂間
啓造 洞田
博 小高
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Tokyo Power Technology Ltd
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Tokyo Electric Power Environmental Engineering Co Inc
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Filing date
Publication date
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Priority to JP2010509028A priority Critical patent/JP4577911B2/ja
Publication of WO2009130813A1 publication Critical patent/WO2009130813A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/40—Solid fuels essentially based on materials of non-mineral origin
    • C10L5/44—Solid fuels essentially based on materials of non-mineral origin on vegetable substances
    • 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
    • C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
    • C02F1/385—Treatment of water, waste water, or sewage by centrifugal separation by centrifuging suspensions
    • 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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • 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
    • C02F3/12—Activated sludge 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/10—Biofuels, e.g. bio-diesel
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
    • 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 to a system for recycling animal and vegetable oil waste liquid. Specifically, it is a system for recycling animal and vegetable oil effluents that can recover valuable materials and does not discharge wastewater out of the system, and is particularly useful for the treatment of effluents discharged from palm oil factories.
  • the present invention relates to a reuse system of animal and vegetable oil effluent that can be used in place of law.
  • Palm-derived oils such as palm oil have been widely used in recent years as edible oils and fats, detergent raw materials, biodiesel fuel and the like.
  • palm oil is produced by extracting palm palm fruits (fruit bunches and seeds), and a large amount of waste liquid is produced as a by-product in this production process.
  • the waste liquid discharged from the palm oil factory is a high BOD value because the oil and fat contained in the oil palm fruit bunch (FFB: Fresh Fruit Bunch) is discharged together with the actual fiber. , COD value and organic acid content.
  • Fig. 4 shows the composition of general palm oil waste (Source: MPOB Malaysia Palm Oil Committee).
  • the treatment of palm oil waste liquor is generally performed by an lagoon of a natural purification sedimentation basin (open lagoon method) by an anaerobic fermentation process, and is discarded after being treated by natural methane fermentation.
  • the open lagoon method accounts for about 95% of the treatment in Malaysia, and a few other open tank treatment methods and closed tank treatment methods are implemented.
  • methane gas generated by fermentation and released into the atmosphere causes global warming, and thus it is difficult to say that the treatment method is sufficiently environmentally friendly.
  • the lagoon occupies a vast site.
  • the lagoon wastewater movement is an overflow method, waste oil and accumulated sludge overflow by the amount of precipitation each time a squall occurs, causing a problem of contaminating the inside and outside of the site.
  • Patent Document 1 discloses that an organic acid in a waste liquid is subjected to acetic acid fermentation by an anaerobic microorganism to extract the organic acid, and the organic acid is used as a raw material for a synthetic fuel such as polylactic acid or alcohol.
  • Chemical recycling methods have been proposed. However, this method takes two days in the microorganism treatment step, and it takes about 18 hours in the freeze separation process in which the suspension treated with microorganisms is frozen and then thawed to separate the solid layer and the liquid layer. Further, electric energy or the like is used in the liquid layer concentration step. Therefore, it is difficult to say that it is a simple and energy saving method.
  • Patent Document 2 waste water is dried by a heat exchanger with the heat quantity of palm oil waste liquid itself, and evaporative condensed water is recovered and reused as water, and sludge is dried and solidified to be recovered and reused as fuel and fertilizer.
  • a method has been proposed. This method includes a drying process of waste liquid, an activated carbon filtration process of evaporated and condensed water, a scraping process of the dried cake, and a moisture content adjusting process of the dried cake with a water absorbent mat laid with a polyacrylate-based superabsorbent polymer. It is composed of The degree of evaporation efficiency with the amount of heat of the waste liquid itself is unknown.
  • the present invention has been made in view of the above circumstances, the agglomeration treatment of animal and vegetable oil waste liquid containing oil and suspension is smooth, the floc dehydration efficiency is good, the production efficiency of dry cake is high, It is an object of the present invention to provide an animal and vegetable oil waste liquid recycling system that can process a large amount of waste liquid at a low cost and that is useful for preventing global warming by suppressing emission of global warming gas.
  • the present invention takes the following means.
  • the animal and vegetable oil waste liquid is clarified by removing sand, solids, oil and suspension contained in the animal and vegetable oil waste liquid, and the obtained fresh water is reused as water for boilers in the factory, and dried cake Is a recycling system for waste fluids of animals and plants oil, (A) separating the sand contained in the animal and vegetable oil waste liquid; (B) separating the solid from the waste liquid from which the sand has been separated; (C) separating the waste liquid from which the solid matter has been separated into oil and waste water by centrifugation; (D) an agglomeration reaction step of adding and mixing a neutral inorganic powder flocculant to the wastewater to collect a suspension contained in the wastewater to form a floc; (E) a concentration step of removing fresh water by centrifugation from a wastewater having a low solid content content containing the floc by a liquid cyclone to obtain a concentrated liquid of the floc; (F) a drying step of drying the floc concentrate and solids to obtain a dry cake
  • a system for recycling animal and vegetable oil waste liquid to be reused as an auxiliary combustion material for (A) separating the sand contained in the animal and vegetable oil waste liquid; (B) separating the solid from the waste liquid from which the sand has been separated; (D) a coagulation reaction step of adding and mixing a neutral inorganic powder flocculant to the waste liquid from which the solid matter has been separated, and collecting a suspension contained in the waste liquid to form a floc; (E) a concentration step of removing fresh water by centrifugation from a waste liquid having a low solid content containing the floc by a liquid cyclone to obtain a concentrated liquid of the floc; (F) a drying step of drying the floc concentrate and solids to obtain a dry cake; An animal and vegetable oil waste liquid
  • A separating the sand contained in the animal and vegetable oil waste liquid
  • B separating the solid from the waste liquid from which the sand has been separated
  • C separating the waste liquid from which the solid matter has been separated into oil and waste water by centrifugation
  • C ′ guiding the waste water to an open lagoon or a storage tank and performing water dilution and aerobic aeration treatment
  • D a coagulation reaction step of adding and mixing a neutral inorganic powder flocculant to the wastewater after the aerobic aeration treatment to collect a suspension contained in the wastewater to form a floc
  • E a concentration step of removing the separated water by centrifugation from the wastewater having a low solid content containing the floc by a liquid cyclone to obtain a concentrated liquid of the floc
  • F a drying step of drying the floc concentrate and solids to obtain a dry cake
  • G filtering the separated water removed by the liquid cyclone and filtering it to make clear water by removing fine particles
  • a recycling system for waste fluids of animal and vegetable oils that recycles dried cake as a combustion aid (A) separating the sand contained in the animal and vegetable oil waste liquid; (B) separating the solid from the waste liquid from which the sand has been separated; (C ′) guiding the waste liquid to an open lagoon or a storage tank, and performing water dilution and aerobic aeration treatment; (D) Aggregation in which a neutral inorganic powder flocculant is added to and mixed with the waste liquid after the aerobic aeration treatment from which the solid matter has been separated, and the suspension contained in the waste liquid is collected to form a floc.
  • a reaction process (E) a concentration step of removing the separated water from the waste liquid having a low solid content containing the floc by centrifugation using a liquid cyclone to obtain a concentrated concentrate of the floc; (F) a drying step of drying the floc concentrate and solids to obtain a dry cake; (G) filtering the separated water removed by the liquid cyclone and filtering it to make clear water by removing fine particles;
  • the fresh water obtained by removing fine particles from the separated water separated in the (e) concentration step is stored in a regulating tank, and then water for dilution and / or animal and vegetable oil production in the aerobic aeration process step
  • a large-capacity anaerobic lagoon is not required, and the surplus ruins can be used for various purposes such as factory land and green space. Moreover, the emission of methane gas is eliminated, which can contribute to the prevention of global warming.
  • Pretreatment to remove sand, fibrous solids and oil contained in palm oil waste liquor, and further aerobic aeration treatment enables the downstream agglomeration treatment to be performed in a small reactor Become.
  • the separated sand can be subjected to soil reduction, and the separated solid can be dried and solidified and used as an auxiliary combustion material, and the separated oil can be handled in the same manner as the squeezed oil.
  • the neutral inorganic powder flocculant used for the flocculation treatment of waste liquid is mainly made from waste paper ash sludge ash or fly ash generated from the combustion of boiler fuel at animal and plant manufacturing factories. Can be provided.
  • the apparatus used for the floc concentration process which is particularly important in the reuse system of the present invention, is a hydrocyclone system, advanced operation management technology is not required.
  • the processing equipment as a whole is excellent in workability because of its low cost and simple configuration.
  • the equipment is smaller and the equipment cost is extremely low compared to existing facilities and demonstration facilities.
  • a palm oil waste liquid As an animal and vegetable oil waste liquid to which the animal and vegetable oil waste liquid recycling system according to the present invention is applied, a palm oil waste liquid will be described as an example.
  • an animal and vegetable oil waste liquid to which the recycling system of the present invention can be applied is described below.
  • waste liquids produced in the process of producing plant-derived oils such as palm, sugarcane, cassava, coconut, and starch bioethanol
  • processes for producing animal-derived oils such as fish oil and beef tallow oil
  • it can also be applied to wastewater from households, offices, and factories that contain these animal and vegetable oils.
  • Palm oil waste liquid refers to a by-product generated from a series of steps of squeezing oil from the fruit of palm palm to obtain palm oil. Specifically, palm oil is obtained by putting an oil palm fruit bunch in a steamer and steaming to peel off the shell of FFB and pressing fruit consisting of fruit bunch and seeds. From these processes, waste liquid containing shells (empty bunches) and fruit bunches-derived by-products (fibers, trace amounts of oil) and the like is generated.
  • the palm oil waste liquid that can be reused by the method of the present invention is obtained by removing palm palm shells and contains a high concentration of organic components.
  • the palm oil waste liquid is composed of sand adhering when palm palm falls to the ground, oil mixed in removing the palm of the oil palm fruit bunch, fibrous solids such as oil palm bunch shell, and suspension. including.
  • the composition of a general palm oil waste liquid is as shown in FIG.
  • the animal and vegetable oil waste liquid recycling system according to claim 1 of the present invention is a system suitable for a waste liquid having a high COD value, such as palm oil waste liquid, having a high oil content.
  • a waste liquid having a high COD value such as palm oil waste liquid
  • the agglomeration treatment can be smoothly performed without inhibiting the agglomeration effect by the oil. The same is applied to the animal and plant waste liquid recycling system according to claim 3 of the present invention.
  • the recycling system for animal and vegetable oil waste liquid according to claim 2 of the present invention is a system suitable for waste liquid not containing oil or waste liquid with low oil content, such as cassava waste liquid or palm oil waste liquid with a low COD value, (C)
  • the process oil-water separation process which isolate
  • a pretreatment operation is performed to remove the sand, solids and oil in advance, and then agglomerate treatment is performed.
  • agglomerate treatment is performed in the flocculation process, oil and the like are removed, so that the amount of flocculating agent added can be reduced and the size of the flocculation apparatus can be easily achieved.
  • step (a) a step of separating sand contained in animal and vegetable oil waste liquid (sand separation step), and (b) a step of solid-solid separation of solid matter from the waste liquid from which sand has been separated (solid matter separation).
  • Step) specific gravity separation of waste liquid from which solids are separated into oil and waste water (oil-water separation step), and (c ′) a step of performing water dilution and aerobic aeration treatment .
  • the sand and solids separated in steps (a) and (b) contain almost no oil. For this reason, valuable oil can be recovered by carrying out the oil / water separation step (step (c)), and the amount of oil adsorbed to the flocculant is greatly reduced in the subsequent agglomeration reaction step. Aggregation efficiency is greatly improved.
  • the organic matter is oxidized and decomposed by diluting the waste water or waste liquid with water and supplying the diluted waste water or waste liquid with oxygen necessary for aerobic decomposition. Therefore, generation
  • production of sludge can be suppressed and, as a result, the addition amount of a flocculant can be reduced in a downstream agglomeration reaction process.
  • the apparatus used in each process in the reuse system of the present invention is of a size that can be transported. These apparatuses are connected by a known method and configured to be used for a series of processes.
  • an apparatus connected by a known method is appropriately discharged from the animal and vegetable oil so that the steps (d) to (e) can be carried out.
  • the floc concentrate obtained in the concentration step is dried and solidified in the drying step by a conventional method to obtain a dried cake.
  • the animal and vegetable oil waste liquid is preferably temporarily stored in a storage tank from the viewpoint of stable treatment.
  • Animal and vegetable oil waste liquid discharged from a palm mill factory, etc., once passed through a screen and then stored in a storage tank can prevent clogging of piping that is likely to occur due to the presence of large solids (fibers etc.) it can.
  • FIG. 1 is a schematic elevation view for explaining a reuse system of animal and vegetable oil waste liquid discharged from a factory
  • FIG. 2 is a schematic plan view thereof
  • FIG. 3 is a block diagram for explaining the flow of processing of the animal and vegetable oil waste liquid discharged from the factory.
  • 10 is a waste liquid storage tank
  • 20 is an agitation reactor used in the agglomeration reaction step
  • 30 is a liquid cyclone type separation device used in the concentration step
  • 50 is a means for drying the aggregation floc used in the drying step (drying).
  • (Chamber) 60 is an adjustment tank for storing separated water.
  • reference numeral 11 denotes a line connecting the waste liquid storage tank 10 and the agitation reaction apparatus 20.
  • 21 is a flocculant storage tank
  • 23 is a flocculant inlet
  • 24 is a reaction tube for stirring and mixing the waste liquid and the flocculant
  • 25 is an automatic control panel for controlling the flow rate of the waste liquid
  • 26 is a liquid feed for sucking and sending the waste liquid. It is a pump (installed inside the device).
  • Reference numeral 27 denotes a line connecting the stirring reaction device and the hydrocyclone type separation device.
  • 31 is a rotary separation tank of the hydrocyclone type rotary separation device.
  • 44 is a line for sending water separated in the concentration step (connected to the adjustment tank 60), 45 is a flock collecting device obtained in the concentration step, 46 is a flock conveying means (bucket conveyor or screw conveyor), 52 is The dry cake obtained by the drying process is shown.
  • animal and vegetable oil waste liquids from an animal and vegetable oil production plant such as a palm mill plant are sequentially subjected to steps (a) to (e).
  • the separated water (fresh water) obtained in the concentration step is temporarily stored in the adjustment tank and then reused as boiler water in the factory.
  • the floc concentrate obtained in the concentration step is supplied to the drying step, it is dried together with solids in the drying step to become a dry cake, and then the dried cake is reused as an auxiliary material for a steam boiler in a factory. Is done.
  • the present invention it is possible to provide a reuse system that does not generate waste water and by-product waste.
  • the separated sand can be soil-reduced, and the separated oil can be reused in the same manner as the extracted oil.
  • the (a) step, the (b) step, and the (c) In the process, sand, solids and oil are separated. Thereafter, the waste water separated in the step (c) is once stored in the waste liquid storage tank, and then supplied to the (d) aggregation reaction step.
  • the storage tank for storing the palm oil waste liquid from the factory is preferably heated to about 80 ° C. in order to promote separation of sand and oil.
  • excess steam in the factory can be reused. Reuse of the surplus steam is possible by sucking surplus low-pressure steam using a steam compressor and increasing the pressure, and supplying the boosted steam to a separate steam use location.
  • (A) Sand separation step In this step, the waste liquid introduced into the cyclone swirls in a conical container having a small diameter at the bottom, and sand having a high specific gravity in the waste liquid is received by the classification effect due to centrifugal force. Collected in the vicinity of the outer diameter portion and discharged from the lower discharge port together with a small amount of water, and waste liquid from which the sand has been removed is collected in the vicinity of the central portion of the container and discharged from the upper discharge port. Since the discharged sand contains almost no oil, it is reduced to the soil after being transported to the deposition site by a screw conveyor or the like. This cyclone removes most of the sand from the effluent. The waste liquid discharged from the cyclone is then introduced into a screw decanter.
  • the screw decanter not only the screw decanter but also the cyclone is used together. If the cyclone is omitted, the sand is directly supplied to the screw decanter, and the inner peripheral surface of the bowl and the screw conveyor. Since the wear of the edge of the steel plate proceeds at an early stage and the lifetime of the decanter is reduced, a cyclone is disposed in the previous stage to remove this in advance.
  • the waste liquid discharged from the liquid outlet includes water, oil, and suspended solids.
  • the solid matter removal by the screw decanter is also performed, so that the fibrous solid matter that cannot be removed by the cyclone can be removed.
  • the oil / water separation efficiency in the downstream centrifuge is significantly improved. For this reason, it becomes possible to reliably remove oil and suspended solids remaining in the waste liquid by agglomeration treatment.
  • the waste liquid discharged in the step (b) is temporarily stored in the cushion tank.
  • the wastewater separated in the above (c) oil-water separation step and (b) the waste liquid that has passed through the solid matter separation step contain a large amount of organic matter. Therefore, before introducing it into the storage tank, the waste water (waste liquid) is diluted with water and subjected to aerobic aeration treatment, and the oxygen necessary for aerobic decomposition is supplied while the organic matter in the waste water (waste liquid) is oxidatively decomposed. It is preferable to do.
  • the dilution may be either dilution by addition of dilution water or dilution with rain water.
  • the aerobic aeration treatment can be performed by introducing wastewater (waste liquid) to an open lagoon or a storage tank, and supplying oxygen necessary for aerobic decomposition to the wastewater (waste liquid) using an aeration apparatus. Aeration and dilution can be performed simultaneously.
  • a well-known apparatus can be used for the aeration apparatus.
  • FIG. 5 and FIG. 6 are block diagrams for explaining the flow of waste liquid treatment when the aerobic aeration treatment process is employed.
  • (D) Aggregation reaction step In this step, first, the waste liquid is introduced into the agitation reaction device 20 through the line 11 from the storage tank 10 storing the animal and vegetable oil waste liquid, and the neutral inorganic powder aggregating agent is added at the inlet. .
  • the flocculant stored in the storage tank 21 is added from a powder inlet 23 provided near the inlet of the reaction tube 24.
  • the flocculant a neutral inorganic powder flocculant mainly composed of calcium oxide is used. Since the flocculant has a pH in the range of 6 to 8 when added to waste water, it is not necessary to adjust the pH of the waste liquid or to perform preliminary dissolution work such as an alkaline agent. It has the advantage that it can be formed. Further, the generated floc has a good dewatering property and can be easily treated with sludge. Incidentally, by adding a neutral inorganic powder flocculant to the palm oil waste liquid (pH 4.2), the pH of the waste liquid becomes 5.5 to 6.0.
  • the amount of flocculant added varies depending on the type of animal and vegetable oil waste liquid to be applied and is not constant, but a predetermined amount is added in consideration of drainage properties, flock formation state and economic efficiency. Since it is an inorganic powder, there is no environmental problem even if the amount added is large, but adding too much is not economical. In this regard, if the waste liquid (drainage) after the pretreatment is used, the solid matter or oil that inhibits the action of the flocculant is removed, so that the flocculant effect can be expressed with the addition of a small amount of flocculant.
  • a neutral inorganic powder flocculant containing about 40 to 50 wt% of calcium oxide is preferably used.
  • a flocculant is used as an animal and vegetable oil waste liquid by agglomerating fine suspended particles such as fibers by using an ettringite needle-like crystal structure generated by a hydration reaction as an initiating agent to grow into a large agglomerated solidified product. Adsorbs a small amount of oil contained in.
  • Such a flocculant can be produced by mixing auxiliary materials with a paper sludge incinerated ash as a main raw material or a thermal power plant fly ash as a main raw material. Most preferably, fly ash generated by combustion of boiler fuel in an oil production plant is used as the main raw material.
  • the main component is calcium oxide, and in addition, about 10 to 30 wt% of silicon dioxide and aluminum oxide are contained.
  • the neutral inorganic powder flocculant used in the present invention is capable of aggregating suspended suspended solids even at high pH, and those containing sulfur trioxide in the flocculant have neutralizing ability. Therefore, it is not necessary to adjust the pH of the waste liquid before addition. Furthermore, the suspension such as oil contained in the palm oil waste liquid can be aggregated only by adding and mixing.
  • the stirring reactor is preferably of a type that can mix the waste liquid and the neutral inorganic powder flocculant by a reaction tube (aggregation reaction tube) from the viewpoint of processing speed and space saving of the device.
  • the device can be used.
  • the storage tank 21 is filled with a neutral inorganic powder flocculant.
  • the addition amount can be adjusted.
  • a liquid feed pump 26 is installed inside the stirring reaction apparatus 20. The waste liquid and the flocculant are agitated through the pump through the reaction tube having an inner diameter of 150 mm ⁇ and a length of about 5 m at a flow rate of about 0.3 to 0.4 m / sec. , Mixed to form agglomerated floc.
  • the waste liquid containing the coagulation floc formed in the coagulation reaction step is sent to the hydrocyclone type separation device.
  • (E) Concentration step In the concentration step, a liquid cyclone separator is used to centrifuge the waste liquid containing the floc having a low solid content by the liquid cyclone, thereby removing water from the waste liquid. Thereby, it is possible to obtain a floc concentrate having a higher concentration (that is, having a reduced volume) than other concentration methods.
  • the waste liquid sent from the agglomeration reaction apparatus 20 is injected into the rotary separation tank 31, and the injected waste liquid is turned into a rotary flow, whereby the floc contained in the waste liquid is centrifuged. Separate and settle down as a precipitate by its own weight. At the same time, the water separated from the floc by centrifugation is discharged out of the device via line 44.
  • the water separated in this step has transparency close to that of fresh water, it is temporarily stored in the adjustment tank 60 to stabilize pH and the like.
  • a strainer can be used as needed in the middle of feeding the separated water obtained in this step to the water storage tank.
  • (F) Drying step In this step, the floc concentrate obtained in the concentration step is dried to obtain a dry cake.
  • the floc concentrate obtained in the upstream process (e) is collected by the flock collecting device 45 and then sent to the drying chamber 50 by a conveying means such as a bucket conveyor or a screw conveyor 46.
  • a conveying means such as a bucket conveyor or a screw conveyor 46.
  • the floc concentrate may be supplied to the solid-liquid separation step for solid-liquid separation to obtain separated water and a separated cake, and then the separated cake may be supplied to the drying step.
  • the solid-liquid separation apparatus a known apparatus or an apparatus equivalent thereto can be used.
  • a solid-liquid separation device that separates water while passing the floc concentrate sent from the floc concentration step over the elliptical plate group can be used.
  • a general dehydrator can be used, and examples thereof include a screw decanter, a screw press, a filter press, and a belt press.
  • a dehydrator is arbitrary, installing on the conveyance means 46 (refer FIG. 1), such as a bucket conveyor or a screw conveyor, is preferable from the point of space saving.
  • the dried cake obtained in the drying process is solidified by a conventional method and reused as an auxiliary combustion material in an animal and vegetable oil production factory.
  • the surplus auxiliary combustion material can be reused as auxiliary combustion material in cement factories and the like.
  • (G) Filtration step In this step, (e) the separated water separated in the concentration step or the separated water obtained by combining the separated water and the separated water separated by dehydration is filtered using a filtration device. . Since fine particles contained in the separated water are removed by filtration, fresh water is obtained.
  • a filtration device a general filtration device can be used, and examples thereof include a depth filtration device using a particulate material such as sand, gravel, and charcoal as a filter material, and a filtration device such as a magnetic filter.
  • the filtered water Since the filtered water has transparency close to that of fresh water, it can be reused as water for dilution in the aerobic aeration process and / or boiler water used in animal and vegetable oil production plants after it is stored in the adjustment tank. it can.
  • the waste liquid storage tank is disposed adjacent to the factory, the pretreatment device is disposed downstream thereof, and the waste liquid storage tank is further disposed. Then, the apparatus used in the agglomeration reaction process and the concentration process is integrally arranged in the subsequent flow, and further, a drying apparatus used in the drying process is installed adjacent to these apparatuses, and further, an adjustment tank is installed if desired, so that the waste liquid And securing resources to be reused can be performed at once. Moreover, since the transport distance of the solid is short, the processing efficiency is excellent.
  • the circulating system is obtained by returning the separated water obtained in the concentration step as boiler water or dilution water in the palm mill factory.
  • the facility can be maintained in an area of 1/10 or less of the lagoon type wastewater treatment equipment, which is the largest among the palm oil wastewater treatment equipment. Therefore, the surplus land can be used as a plantation for regeneration as a carbon dioxide absorption source and reservoirs, creating new industries such as further prevention of global warming and aquaculture.
  • the reuse system of the present invention can be preferably used for palm oil waste liquid, waste liquid produced in the process of producing plant-derived oil such as palm, sugarcane, cassava, coconut, and starch bioethanol; fish oil, beef tallow oil, etc. Wastewater generated in the process of producing animal-derived oil; other wastewater from households, business establishments and factories, and those containing these animal and vegetable oils.
  • plant-derived oil such as palm, sugarcane, cassava, coconut, and starch bioethanol
  • fish oil beef tallow oil
  • Wastewater generated in the process of producing animal-derived oil other wastewater from households, business establishments and factories, and those containing these animal and vegetable oils.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Physical Water Treatments (AREA)
  • Activated Sludge Processes (AREA)
  • Treatment Of Sludge (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)

Abstract

L'invention concerne un système de réutilisation d'un liquide usagé à base d'huile animale/végétale, qui réduit l'émission de gaz à effet de serre et contribue ainsi à la prévention du réchauffement de la planète. Selon le système de réutilisation d'un liquide usagé à base d'huile animale/végétale de l'invention, le liquide usagé à base d'huile animale/végétale est clarifié en éliminant le sable, les solides, l'huile et les matières en suspension qu'il contient, et l'eau claire ainsi obtenue est utilisée en tant qu'eau de service, tandis que le gâteau sec est utilisé en tant que combustible auxiliaire dans une usine. Ce système comprend les étapes consistant à réaliser un prétraitement d'élimination du sable, des solides, de l'huile et des matières en suspension contenus dans le liquide usagé, soumettre le liquide usagé à une aération aérobie, ajouter un coagulant poudreux inorganique neutre au liquide usagé et le mélanger avec le liquide usagé pour former des flocons, centrifuger le liquide usagé contenant des flocons avec un cyclone liquide pour éliminer l'eau séparée et obtenir un concentré de flocons, puis sécher le concentré de flocons avec les solides pour obtenir un gâteau sec. Le sable est retransféré dans la terre et l'huile est réutilisée.
PCT/JP2008/070076 2008-04-24 2008-11-05 Système de réutilisation d’un liquide usagé à base d’huile animale/végétale Ceased WO2009130813A1 (fr)

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JP2008113293 2008-04-24
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JP2008-212468 2008-08-21

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Cited By (9)

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WO2011007505A1 (fr) * 2009-07-13 2011-01-20 Noguchi Kazutoshi Procédé de traitement pour matériau de déchet généré par un processus de production d'huile de palme crue
JP2012250225A (ja) * 2011-06-07 2012-12-20 Horibe Yoshikazu パーム廃油の処理方法
CN104773880A (zh) * 2015-05-05 2015-07-15 南充西南石油大学设计研究院有限责任公司 钻井污水处理工艺及设备
CN105174601A (zh) * 2015-07-16 2015-12-23 华南理工大学 一种木薯酒精废水的生物处理工艺
JP2016507370A (ja) * 2013-01-16 2016-03-10 ドン ベ，ヒ パーム油の生産加工工程から最終的に排出される排出水とパーム副産物とを利用した処理設備及び処理方法
FR3051460A1 (fr) * 2016-05-23 2017-11-24 Suez Groupe Procede et installation de traitement des eaux
CN111995089A (zh) * 2020-08-19 2020-11-27 周刚 一种用于机械零部件加工用废水处理机构
CN114576952A (zh) * 2022-03-02 2022-06-03 江苏三仪动物营养科技有限公司 一种以餐厨垃圾为原料制备畜禽饲料的装置及制备方法
IT202300015420A1 (it) * 2023-07-21 2025-01-21 Chimitrade S P A Processo di pre-trattamento dei sottoprodotti liquidi oleosi vegetali di risulta dell’agro-industria come carica per la produzione di bio-carburanti

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KR200479288Y1 (ko) * 2010-11-15 2016-01-13 대우조선해양 주식회사 드릴쉽의 드레인 워터 재생 시스템
CN112430488A (zh) * 2020-11-06 2021-03-02 湖南中泉环保能源科技有限公司 一种生物质材料颗粒机械加工打碎装置
CN115724485B (zh) * 2022-12-20 2025-07-25 山东阳谷华泰化工股份有限公司 一种有机浓缩废液的干燥装置及处理方法

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WO2011007505A1 (fr) * 2009-07-13 2011-01-20 Noguchi Kazutoshi Procédé de traitement pour matériau de déchet généré par un processus de production d'huile de palme crue
JP2012250225A (ja) * 2011-06-07 2012-12-20 Horibe Yoshikazu パーム廃油の処理方法
JP2016507370A (ja) * 2013-01-16 2016-03-10 ドン ベ，ヒ パーム油の生産加工工程から最終的に排出される排出水とパーム副産物とを利用した処理設備及び処理方法
CN104773880A (zh) * 2015-05-05 2015-07-15 南充西南石油大学设计研究院有限责任公司 钻井污水处理工艺及设备
CN105174601A (zh) * 2015-07-16 2015-12-23 华南理工大学 一种木薯酒精废水的生物处理工艺
FR3051460A1 (fr) * 2016-05-23 2017-11-24 Suez Groupe Procede et installation de traitement des eaux
CN111995089A (zh) * 2020-08-19 2020-11-27 周刚 一种用于机械零部件加工用废水处理机构
CN114576952A (zh) * 2022-03-02 2022-06-03 江苏三仪动物营养科技有限公司 一种以餐厨垃圾为原料制备畜禽饲料的装置及制备方法
IT202300015420A1 (it) * 2023-07-21 2025-01-21 Chimitrade S P A Processo di pre-trattamento dei sottoprodotti liquidi oleosi vegetali di risulta dell’agro-industria come carica per la produzione di bio-carburanti
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