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WO2004080903A1 - Systeme de traitement d'eaux usees tres rapide ne produisant pas de boues - Google Patents

Systeme de traitement d'eaux usees tres rapide ne produisant pas de boues Download PDF

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Publication number
WO2004080903A1
WO2004080903A1 PCT/JP2004/003136 JP2004003136W WO2004080903A1 WO 2004080903 A1 WO2004080903 A1 WO 2004080903A1 JP 2004003136 W JP2004003136 W JP 2004003136W WO 2004080903 A1 WO2004080903 A1 WO 2004080903A1
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WIPO (PCT)
Prior art keywords
bacterium
zeolite
concentration
sludge
membrane
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PCT/JP2004/003136
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English (en)
Japanese (ja)
Inventor
Tadayuki Imanaka
Kiyoshi Suzuki
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IP BIO Corp
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IP BIO Corp
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Classifications

    • 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
    • C02F3/1236—Particular type of activated sludge installations
    • C02F3/1268—Membrane bioreactor systems
    • C02F3/1273—Submerged membrane bioreactors
    • 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
    • C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/32—Hydrocarbons, e.g. oil
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/02—Odour removal or prevention of malodour
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/04—Disinfection
    • 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 the field of wastewater treatment. More specifically, the present invention relates to a non-sludge high-speed wastewater treatment system using a strong oxidative degradation bacteria culture means, a high-concentration oxygen supply means, and a solid-liquid separation means.
  • BACKGROUND ART Biological treatment is the most widely used technique for treating organic wastewater. Biological treatment methods include aerobic treatment such as activated sludge method, biofilm method and stabilization pond method, and anaerobic treatment. Its history dates back to the end of the 19th century (Eiichi Mikami, biological treatment in water treatment technology, water and wastewater, 27 (10) 11 (19985)).
  • Activated sludge is a continuous process in which floc-like biological growth (activated sludge) is mixed with wastewater, aerated, and then separated from the wastewater by sedimentation.
  • Fig. 1 (a) shows a typical process flow of the conventional activated sludge method. This is a process called the standard activated sludge method. Wastewater (raw water) 1 is first introduced into the adjustment tank 3.
  • Activated sludge is sensitive to fluctuations in pH, load fluctuations, and sudden influxes and leaks of toxic substances.Therefore, it is necessary to adjust activated sludge according to the properties of raw water so as not to adversely affect activated sludge. is there.
  • the raw water introduced into the neutralization tank 5 is introduced into the aeration tank (activated sludge tank) 7 and mixed with the returned sludge 11 at the inflow end of the aeration tank. Then, the mixture of wastewater and activated sludge passes through the aeration tank. Organic substances are gradually removed through this process.
  • the activated sludge that has passed through the aeration tank It is introduced into the bath tank 9, separated from the treated water 21 by settling, and returned to the aeration tank. Activated sludge decomposes organic matter in the influent wastewater in the presence of oxygen, releases carbon dioxide and proliferates the activated sludge.
  • the present invention solves the above-mentioned problems of the conventional activated sludge method, i) no sludge is generated (no sludge treatment cost is required); ii) drastically reduced running cost (conventional 110); iii) high-speed treatment (Conventional 1Z10); iv) Easy operation (semi-unmanned); V) Objective to provide a system that can use existing equipment as it is.
  • the present invention relates to a non-sludge high-speed wastewater treatment system, which can include a means for culturing strong oxidatively decomposing bacteria, a means for providing high-concentration oxygen, and a solid-liquid separation means.
  • the system may further comprise a strong oxidatively degrading bacterium.
  • the non-sludge high-speed wastewater treatment system may further include an oil removal means for pretreatment of wastewater, if necessary.
  • the non-sludge high-speed wastewater treatment system may further include a nitrogen removing means as needed.
  • the non-sludge high-speed drainage treatment system may further include a heavy metal removing means as required.
  • the non-sludge high-speed wastewater treatment system may further include a sterilizing means as required.
  • the non-sludge high-speed wastewater treatment system may further include a deodorizing and removing means as needed.
  • the high-concentration oxygen providing means includes: an oxygen providing means; and fine bubble generation. Means may be provided.
  • the microbubble generating means removes bubbles having a diameter of about 5 / cm2, about 3 mm, about lm, about 0.5 m, about 0.2, about 0.1 xm, more preferably no more than about 3. Can occur.
  • the solid-liquid separation means may be a porous membrane.
  • the porous membrane can be a metal membrane or a ultrafiltration membrane.
  • the metal film can be manufactured by spraying stainless metal particles onto a stainless steel wire net and then sintering.
  • the ultrafiltration membrane may be tubular.
  • the ultrafiltration membrane is a hollow fiber membrane.
  • the hollow fiber membrane has a pore size of 0.01 m to 0.5 m in diameter.
  • the ultrafiltration membrane is capable of permeating solvents, metal ions, etc. without applying pressure to the wastewater to be treated and bringing the wastewater into contact with the membrane, without allowing microorganisms and the like in the wastewater to permeate through the membrane.
  • the material of the ultrafiltration membrane is, for example, but not limited to, polysulfone and polyvinyl alcohol.
  • a hollow fiber membrane When a hollow fiber membrane is used, by applying pressure to the wastewater and letting it pass through the inside of the hollow fiber, it is possible to permeate a solvent, metal ions, and the like through the membrane without allowing microorganisms and the like in the wastewater to pass through the membrane.
  • the treated wastewater can be circulated inside the hollow fiber and concentrated.
  • the porous membrane may have a pore size of about 0.2 im in diameter.
  • the strongly oxidatively degrading bacterium is a bacillus that shows a growth rate of 30 minutes or less at 30 ° C. in a complete medium and that degrades oils and fats under aerobic conditions. obtain.
  • the bacillus is capable of producing a fat / oil decomposition promoting substance selected from the group consisting of protease, cellulase, amylase, lipase, and biological surfactant.
  • a fat / oil decomposition promoting substance selected from the group consisting of protease, cellulase, amylase, lipase, and biological surfactant.
  • the bacilli can produce a biological surfactant.
  • the bacilli are capable of producing amylase and lipase.
  • the bacilli are capable of producing cellulase.
  • the bacilli are capable of producing protease and amylase.
  • the bacillus may be Bacillus subtilis FERM BP-7270.
  • the bacillus is Bacillus. Subtilis FERM BP-7271.
  • the strongly oxidatively degrading bacterium may include a polypinyl alcohol degrading bacterium.
  • the polyvinyl alcohol-degrading bacterium may be Pseudomonas strain FERM P-19204.
  • the polyvinyl alcohol-degrading bacterium is an Acinetobacter IAM
  • the polyvinyl alcohol-degrading bacterium may be Acinetopaque yuichi IAM-4 strain.
  • the present invention also relates to a non-sludge high-speed wastewater treatment system comprising a decomposition reaction tank, high-concentration oxygen providing means, and solid-liquid separation means.
  • the high-concentration oxygen providing means and the solid-liquid separation means may be combined to increase the concentration of microorganisms in the decomposition reaction vessel to at least 10, OO Opm.
  • the high-concentration oxygen providing means can convect the liquid in the decomposition reaction tank.
  • FIG. 1 is a diagram showing an example of the system of the present invention in comparison with a conventional technology. (a) shows the prior art, and (b) shows the system of the present invention.
  • FIG. 2 is a diagram showing an example of the system of the present invention.
  • FIG. 3 is a diagram showing an example of the high-concentration oxygen providing means used in the system of the present invention.
  • FIG. 4 is a diagram showing an example of the system of the present invention.
  • FIG. 5 is a diagram showing operation results of the system of the present invention.
  • FIG. 6 is an electron micrograph of an example of bacteria used in the system of the present invention.
  • FIG. 7 is a diagram showing an operation result of the system of the present invention.
  • FIG. 8 is a diagram showing an example of the system of the present invention.
  • FIG. 9 is a diagram showing the results of comparing the bactericidal activity of Cu-type zeolite and Ag-type zeolite.
  • FIG. 10 is a diagram showing the results of comparing the bactericidal activity of Cu-type zeolite and Ag-type zeolite.
  • Figure 11 shows the results of comparing the bactericidal activity of Cu-type zeolites and Ag-type zeolites against bacteria in seawater.
  • strongly oxidatively degrading bacteria refers to a group of useful microorganisms, such as hard-to-degrade COD-utilizing bacteria, and is generally a genus Bacillus (Ba ci 11 us), Pseudomonas (Pseudomonas). Includes bacteria belonging to the genera, genus Acinetha, genus Acinet ob acter, and genus Arthr ob acter. Strongly oxidatively degrading bacteria generally have the ability to strongly oxidize organic matter, thereby achieving zero excess sludge generation.
  • Bacillus subtilis FERM P-17512 and Bacillus subtilis FERM P-17513, which are lipolytic bacilli described in JP-A-2001-61468 by the present inventors.
  • Bacillus subtilis FERM P-17512 is a Gram-stained, rod-shaped bacterium with unstable Gram-stainability, and the stained cells are transferred to a deposit under the Budapest Treaty. Easily bleached. This bacterium was positive for catalase and oxidase.
  • PVA Biel alcohol
  • these patent documents are incorporated herein in their entirety.
  • Representative examples of this PVA-degrading bacterium include Pseudomonas FERM P-19204 strain, Acinetobacter IAM-3 strain, and IAM-4 strain.
  • the Acipetopactor I AM-3 and IAM-4 strains are stored at the graduate School of Engineering, Kyoto University (Yoshida-Honmachi, Sakyo-ku, Kyoto-shi) and sold on request.
  • any bacteria isolated according to the methods described in these patent documents can be used as strong oxidative decomposers.
  • the above bacterium can be modified using a mutation treatment, acclimatization, genetic engineering technique and the like well known to those skilled in the art, and used as a strongly oxidatively degrading bacterium.
  • the hardly decomposable substance typified by PVA
  • the capacitive load 0. 1 ⁇ 0. 8 k gZm 3 ⁇ day, capable of decomposing under C OD removal rate 90% or more .
  • oil / fat refers to an n-hexane extractable substance measured according to the gravimetric method described in Table 4 of the Notification of the Environment Agency No. 64.
  • generation time refers to the average time required from one cell division to the next, ie, the average time required for doubling the number of cells (doubling time). A growth rate that is less than or equal to 30 minutes is a term well known to those skilled in the art, and can be rephrased as having a specific growth rate of at least 1.38 Z hours.
  • the “specific growth rate”, which indicates the growth rate of microorganisms, is obtained by measuring the absorbance at 660 nm (OD660) of the culture over time and plotting it on a semilogarithmic graph. Calculated as ⁇ [1Z time].
  • proteolytic enzyme As used herein, the terms “protease”, “cellulase”, “amylase”, and “lipase” are generally used in the meanings used in the art, and they are used for proteolytic enzyme, fibrinolytic enzyme, Starch hydrolase and lipolytic enzyme are collectively referred to, and their activities can be measured by methods known in the art.
  • biological surfactant refers to a surfactant produced by a living organism, and particularly a surfactant produced by a microorganism outside a cell. Refers to quality.
  • biological surfactants have a hydrophilic site and a hydrophobic site in the molecule, and a typical example is a glycolipid in which a hydrophilic sugar and a hydrophobic fatty acid are bonded. Not limited.
  • the “high-concentration oxygen providing means” used in the present invention may typically include an oxygen providing means and a microbubble generating means.
  • the high oxygen supply means provides a strong air (oxygen) supply to cultivate strong oxidatively degrading bacteria at a high concentration and maintain the complete oxidative decomposition activity of organic matter.
  • This high-concentration oxygen supply means prevents the decomposition activity of the strongly degrading bacteria present in the aeration tank at a high concentration from being limited by oxygen supply.
  • the microbubble generating means can generate microbubbles (ultrafine bubbles) having a diameter () of less than about 3 m.
  • the fine bubble generating means include, for example, an ultra-fine bubble generating device (Suzuki Sangyo Co., Ltd., 5-6, Yamadanakayoshimi-cho, Nishikyo-ku, Kyoto-shi), and JP-A No. 2001-3114888 A diffuser can be used.
  • the air diffusion device described in Japanese Patent Application Laid-Open No. 2001-3140888 has a bell-shaped gas-liquid mixing cylinder, in which a plurality of protrusions are arranged. I have.
  • the effect of the projections is that, when the liquid containing the bubbles hits the projections, the bubbles are broken into small pieces and the gas and the liquid are mixed. As the bubbles become smaller, the contact area between the gas and the liquid surface increases.
  • An air discharge nozzle is provided below the gas-liquid mixing cylinder, and the air discharge nozzle is connected to an air supply pipe.
  • the air discharge nozzle is disposed obliquely upward and slightly inward from the tangential direction of the gas-liquid mixing cylinder.
  • the air When the air is discharged from the air discharge nozzle, the air rises obliquely upward along the inner wall of the gas-liquid mixing cylinder.
  • a water flow is generated in the gas-liquid mixing cylinder.
  • the water flow generated in the gas-liquid mixing cylinder rises spirally along the inner wall of the gas-liquid mixing cylinder.
  • An ultra-fine bubble is a bubble having a diameter of 0.1 / m to 3 and smaller than a fine bubble (diameter of 10 to 100 m).
  • the ultrafine bubbles have small buoyancy due to their small diameter, so they are likely to get on the swirling water stream and get caught in the downward flow in the processing tank, and thus stay in the processing tank and stay in the processing tank. Is uniformly diffused. As a result, the microbubbles are not dissolved in the water, but rather are dispersed and float in the water, and can exist in the water at a concentration equivalent to 180 to 200 ppm.
  • the means for generating microbubbles may be connected to the means for providing oxygen, thereby providing a more enriched oxygen environment.
  • High-concentration oxygen supply means equipped with microbubble generation means and oxygen supply means can dissolve oxygen of about 93% purity at a concentration of 180 ppm, and inject oxygen into bubbles of about 3 m in diameter
  • a BOD treatment capacity about 10 times that of the conventional activated sludge method is possible.
  • a standard activated sludge BOD volume load of 0.5-1.5 kg / m 2 ⁇ day can be increased to about 5 kg / m 2 ⁇ day.
  • the solid-liquid separation means enables wastewater treatment by microorganisms with a high concentration exceeding about 13, OOO ppm by solid-liquid separation.
  • a microfiltration membrane, an ultrafiltration membrane, a reverse osmosis membrane, or the like can be used as the solid-liquid separation means.
  • a metal membrane is used as a solid-liquid separation means, and is produced by, for example, spraying stainless metal particles on a stainless steel wire mesh and sintering. This solid-liquid separation metal membrane has physical strength not found in resin membrane, It can be used even under severe conditions.
  • 1 heat resistance is high, steam sterilization at 121 ° C is possible; 2 chemical resistance is high, washing with strong alkaline and strong acid is possible; 3 handling of organic solvents is possible; ⁇ ⁇ ⁇ High mechanical strength and can handle highly viscous fluids; 5
  • the membrane itself is not assimilated by microorganisms and does not need to be immersed in a bacteriostatic agent during storage. . If film fouling occurs, the decomposition of organic components by alkali and the dissolution of inorganic scale by acid may be performed. Functional degradation due to deterioration is almost negligible. Cleaning such as a sponge pole or backwashing, such as a resin film whose function is reduced by such cleaning, is unnecessary.
  • the metal film is a porous film and typically has a pore size of about 0.2 im in diameter.
  • the ultrafiltration membrane may be tubular.
  • the ultrafiltration membrane is a hollow fiber membrane.
  • the hollow fiber membrane has a pore size of 0.01 / im to 0.5111 in diameter.
  • the ultrafiltration membrane is capable of permeating solvents, metal ions, etc. without applying pressure to the wastewater to be treated and bringing the wastewater into contact with the membrane, without allowing microorganisms and the like in the wastewater to permeate through the membrane.
  • the material of the ultrafiltration membrane is, for example, but not limited to, polysulfone and polyvinyl alcohol.
  • a hollow fiber membrane When a hollow fiber membrane is used, by applying pressure to the wastewater and letting it pass through the inside of the hollow fiber, it is possible to permeate a solvent, metal ions, and the like through the membrane without allowing microorganisms and the like in the wastewater to pass through the membrane.
  • the treated wastewater can be circulated inside the hollow fiber and concentrated.
  • the hollow fiber membrane itself containing the concentrated wastewater can be incinerated, which facilitates the treatment.
  • the non-sludge high-speed wastewater treatment system of the present invention comprises the above-mentioned strong oxidative degrading bacteria, high-concentration oxygen providing means, and solid-liquid separation means, whereby organic matter in the wastewater is finally converted into carbon dioxide gas and water. Decomposition can eliminate the generation of excess sludge.
  • the non-sludge high-speed wastewater treatment system of the present invention further Oil removal means for pretreatment may be provided.
  • Oil removal means include, but are not limited to, SIMS (EMS; JPS Inc., Kagawa-cho, Kagawa-gun, Kagawa).
  • Immus Volatile particulate matter is produced by adding silicone oil and an alkaline solution to incinerated ash, mixing, stirring, and solidifying. When these particles are added to a mixture of oil and water, the particles repel the water and float in water as the oil is taken into the pores of the particles.
  • the safe organic oil recovered in this way can be used as a substitute for oil cake, and in the case of mineral oil, can be reused as fuel.
  • the amount of addition of ims can be appropriately selected according to the ratio of fats and oils in the wastewater. Typically, a concentration of 0.1 to 10% (wXv) is used.
  • wXv 0.1 to 10%
  • the term “zeolite” refers to a porous substance having many cavities in a crystal and has at least one of the following basic units.
  • the first fundamental unit of the Si_ ⁇ 4 tetrahedrons and Si are A10 4 tetrahedra substituted with A1, two additional T0 4 tetrahedra also all ⁇ shared between the first basic structure include.
  • the second basic unit is a four-, six-, eight-, or twelve-membered ring formed by connecting tetrahedrons, and a double ring in which each of these is overlapped by two.
  • a special case is the five-membered mordenite ring.
  • the third unit is a large symmetric polyhedron, octahedron (TO—sodalite unit), decahedron (TO—cantharinite-cancrinite unit), and tetradecahedron (gmelinite-gmelin-fluorite unit). ).
  • TO sinalite unit
  • decahedron TO—cantharinite-cancrinite unit
  • tetradecahedron gmelinite-gmelin-fluorite unit.
  • the structure and cavities of zeolite formed by the connection form of the second basic unit are diverse, and various polyhedrons are formed, from the octahedron found in zeolite A to the 26-hedron found in faujasite.
  • Zeolites contain water molecules and exchangeable cations in the large cavities of a comprehensive anion with a three-dimensional framework structure of aluminosilicate.There are various types of cations depending on the skeleton (Si / Al) ratio and cation type. A structure is formed.
  • zeolite The shape of zeolite is indefinite in natural zeolite, and spherical or circular in synthetic zeolite. It has pillars and is circular in artificial zeolite. Particle size is expressed in units of micronanometers.
  • the cations contained in the zeolite crystal cavities can be exchanged depending on the type of cations, the size of the cage, and the strength of the electrostatic field.
  • Zeolite has the function of absorbing and converting cation crystals. The ability to exchange cations is called “cation exchange capacity (CEC)” or “base substitution capacity”. The higher the value, the higher the ability to exchange cation crystals. Is done.
  • CEC cation exchange capacity
  • A1 has +3 valence and Si has +4 valence, and one positive charge per Al molecule is insufficient. Therefore, the CEC is generally larger as the alum ratio is smaller.
  • Artificial zeolite for example, according to the method described in JP-A-2003-002638, the raw material concentration at the time of the heat treatment of the raw material containing coal ash is 0.2 kg / Pt or more, and the heating temperature is 100 ° C or more It can be synthesized by heat treatment in an alkaline aqueous solution.
  • the alkaline solution used here include an aqueous alkali solution such as sodium hydroxide, calcium hydroxide and magnesium hydroxide.
  • the alkali aqueous solution is added so that the concentration of the raw material (solid content) is 0.2 kgZ liter or more, preferably 0.3 kgZ liter or more, more preferably 0.5 kgL or more. If the concentration of the alkaline aqueous solution is less than 0.2 kgZ liter, the minerals (quartz and mullite) contained in the coal ash will undergo a physicochemical reaction and the zeolite will be unstable.
  • the concentration of the raw material is preferably 1 kg, liter or less, particularly preferably 0.7 kgZ liter or less. If the raw material concentration is higher than 1 kg liter, the basic structure of zeolite tends to be difficult to form.
  • the concentration of the alkaline aqueous solution is preferably 2 to 4N, particularly preferably 2 to 3.5N. If the concentration of the alkaline aqueous solution is less than 2 N, the reactivity of the gel product having a zeolite composition tends to decrease, and if it exceeds 4 N, the crystalline product of the porous product of zeolite tends to be broken.
  • fly ash from coal incineration ash (produced by Ishikawa Coal Power Plant) 8 kg, a 25% aqueous sodium hydroxide solution 33 kg (3.5 N), 33 liters of water , 6 kg of waste diatomaceous earth is added to add diatom 6.
  • the non-sludge high-speed wastewater treatment system of the present invention may further include nitrogen removing means as needed.
  • the nitrogen removing means include, but are not limited to, zeolite supporting calcium.
  • zeolite supporting calcium When activated sludge is treated aerobically, it is usually detected as nitrate nitrogen as nitrogen remaining in the treated water. If this water is treated with, for example, zeolite carrying calcium, nitric acid can be removed.
  • Examples of the zeolite supporting calcium include, but are not limited to, Ryukyu Light No. 10 (Environmental Purification Center Co., Ltd.).
  • the amount of zeolite to be added can be appropriately selected according to the nitrogen content in the wastewater. Typically, a concentration of 0.1-10% (w / v) is used.
  • the non-sludge high-speed wastewater treatment system of the present invention may further include a heavy metal removing means as needed.
  • the heavy metal removing means includes, but is not limited to, Fe-type, Na-type, and Ca-type zeolites. Preferably, about 1 to 10% of zeolite is added.
  • Examples of zeolite for removing heavy metals include, but are not limited to, Ryukyu Light No. 20 (Environmental Cleansing Center Co., Ltd.).
  • the amount of zeolite to be added can be appropriately selected according to the ratio of heavy metals in the wastewater. Typically, a concentration of 0.1-10% (w / v) is used.
  • the non-sludge high-speed wastewater treatment system of the present invention may further include a sterilizing / deodorizing means as required.
  • sterilization and deodorization means include, but are not limited to, Ag-type zeolite.
  • zeolite for disinfection and deodorization include, but are not limited to, Ryukyu Light RA (Environmental Purification Senyuichi). Ag + ionized in water has no effect on the human body. Also carried Cu Zeolite did not show any bactericidal effect. Further, with Ag-loaded zeolite, deodorization can also be performed.
  • This sterilization method can be used not only for wastewater treatment but also for sterilization of pools.
  • the amount of zeolite to be added can be appropriately selected according to the amount of microorganisms in the wastewater. Typically, concentrations of 0.001 to 10% (w / v) are used.
  • the order of the nitrogen removing means, the heavy metal removing means, and the sterilizing / deodorizing means is not limited to the order of the nitrogen removing means, the sterilizing / deodorizing means, and the heavy metal removing means.
  • Means, and the order of sterilization and deodorization means even the order of heavy metal removal means, sterilization, deodorization means, and nitrogen removal means, sterilization-deodorization means, nitrogen removal means, and heavy metal removal
  • the order of the means may be the order of the sterilizing / deodorizing means, the heavy metal removing means, and the nitrogen removing means. Further, a system provided with only one of these three means or only two of these means is also within the scope of the present invention.
  • the present invention combines conventional activated sludge with large-scale aeration by combining useful microorganisms such as strong oxidatively degrading bacteria and recalcitrant COD assimilating bacteria, high acidity equipment, and solid-liquid separation membrane. Provide a wastewater treatment system that does not depend on tanks.
  • the non-sludge high-speed wastewater treatment system of the present invention includes a means for culturing strong oxidatively degrading bacteria, a means for providing high-concentration oxygen, and a solid-liquid separation means.
  • the non-sludge high-speed wastewater treatment system of the present invention may further include an oil removing means for pretreatment of wastewater, if necessary.
  • the non-sludge high-speed wastewater treatment system of the present invention may further include nitrogen removing means as needed.
  • the processing system may further include a heavy metal removing means as needed.
  • the non-sludge high-speed wastewater treatment system of the present invention may further include a sterilizing means as needed.
  • the non-sludge high-speed wastewater treatment system of the present invention may further include a deodorizing and removing means as needed.
  • FIG. 1 One example of an embodiment of the present invention is shown in FIG.
  • the provision of the conditioning tank 3 and the neutralization tank 5 is the same as the conventional activated sludge method described above.
  • the sludge containing the strong oxidatively degrading bacteria is retained in the decomposition reaction tank.
  • the raw water that has passed through the decomposition reaction tank 17 is sent to a denitrification tank as needed, and then flows into the microorganism separation tank 19.
  • the metal membrane 23 arranged in the microorganism separation tank 19 also captures sludge and free bacteria.
  • the reference numeral 25 in the figure schematically shows a means for providing high-concentration oxygen as a powerful air conditioning system.
  • the high-concentration oxygen providing means 25 may be connected to a decomposition reaction tank 17 and, if necessary, a denitrification tank or a microorganism separation tank 19.
  • Reference numeral 43 in Fig. 1 (b) indicates a tank for an additive (enricher) supplied to the strong oxidative degrading bacteria as needed.
  • the high-concentration oxygen providing means includes an oxygen generator 36, an ultrafine bubble generator 35, and an aerator 33.
  • an oxygen generator 36 for example, commercially available from Suzuki Sangyo Co., Ltd. (5-6 Yamadanakayoshimi-cho, Nishikyo-ku, Kyoto-shi)
  • an air conditioner An air diffuser having the structure shown in FIG. 3 can be used.
  • This ultra-fine bubble generator generates ultra-fine bubbles to increase the concentration of dissolved air, and by adding an oxygen generator to the air inlet of this ultra-fine bubble generator, a concentration of about 93% Pure oxygen is introduced, and a high concentration oxygen environment (dissolved oxygen concentration of 200 ppm or more) is achieved in the decomposition reaction tank 17.
  • the diffuser having the structure includes a bell-shaped gas-liquid mixing cylinder 12 1 as shown in the figure, and generates an ultra-high-speed spiral flow of ultrafine bubbles in the gas-liquid mixing cylinder. Bubbles collide with the projections 1 17 and 1 18 at the top, and ultra-fine bubbles are released from the upper opening 1 15.
  • the non-sludge high-speed drainage system includes an inflow tank 1 ′, a decomposition reaction tank 17 ′, an outflow tank 22 ′, a solid-liquid separation unit 23 ′, and an air diffuser 25 ′.
  • wastewater is supplied from the inflow tank to the decomposition reaction tank by the pump indicated by P.
  • the diffuser generates an upward flow of the generated fine bubbles in the decomposition reaction tank, thereby stirring the liquid in the decomposition reaction tank and causing a flow in the decomposition reaction tank indicated by an arrow in FIG.
  • the wastewater treated in the decomposition reaction tank is separated into solid and liquid by a metal membrane via a pump P.
  • the treated water that has passed through the metal membrane is introduced into the outflow tank.
  • FIG. 8 shows another example of the embodiment of the present invention.
  • oil removing means 13 1 nitrogen removing means 13 2, heavy metal removing means 13 3, sterilizing / deodorizing removing means 1 34 are added to Embodiment 2. .
  • the treated waste water from the neutralization tank 5 passes through oil removing means 13 1 including EMS (EMS; JPS Co., Ltd., Kagawa-cho, Kagawa-gun) to remove oil.
  • EMS EMS
  • the treated wastewater that has passed through the non-sludge high-speed wastewater treatment system according to the second embodiment is then subjected to nitrogen removal means including Ryukyu Lite No. 10 (Environmental Purification Center Co., Ltd.). Is filtered.
  • the treated wastewater is filtered by heavy metal removal means, including Ryukyu Light No. 20 (Environmental Purification Senyuichi).
  • the treated wastewater is filtered by sterilizing and deodorizing means including Ryukyu Lite RA (Environmental Purification Center Co., Ltd.).
  • the wastewater was treated using the system according to the third embodiment shown in FIG.
  • the drainage synthetic wastewater (PVA50mgZL, peptone 75MgZL, meat extract 50 mg L, urea 25mgZL, Na 2 HP0 4 25mgZL, KC 13. 5mg / L, C a C 1 2 3. 5mgZL, MgS_ ⁇ 4 2. 5 mg / L , NaC 17.5mg / L).
  • the capacity of the decomposition reaction tank 17 ' was 15L.
  • As the metal film a stainless steel wire mesh (pore size 0.1 ljm, 30 ⁇ 50 cm) was used.
  • FIG. 5 shows the results of the MLSS in the decomposition reaction tank over time. As shown in the figure, 60 days after the start of operation of the system, the MLSS in the decomposition reaction tank exceeded 1000 OmgZL, and a significant increase in the concentration of microorganisms was observed due to solid-liquid separation using a metal membrane.
  • a and b in FIG. 6 indicate the distance between the baffle plate and the metal film, and the distance between the metal film and the wall of the decomposition reaction tank.
  • a and b were each set to 2.5 cm.
  • Figure 6 is an electron micrograph of the bacteria present in the decomposition reaction tank. Fig. 6 The bacterium was identified as a bacterium belonging to the genus Bacillus, and the bacterium on the right in FIG. 6 was identified as a bacterium belonging to the genus Arthrobacter. (Example 2)
  • the wastewater was treated using the system according to the second embodiment shown in FIG. Wastewater from a dyeing factory containing PVA was used as wastewater.
  • Degradation reaction tank 17 is the first tank containing strong oxidative degradation bacteria (Pseudomonas FERM P-19204 strain, Acinetovak Yuichi IAM-3 strain, IAM-4 strain), and reaction tank 18 contains acclimated PVA sludge
  • the second tank was used and the microorganism separation tank 19 was used as the third tank.
  • the capacity of each tank was about 4 m3.
  • Fig. 7 shows the operation results.
  • the horizontal axis in FIG. 7 indicates the operation period.
  • the upper two graphs in Fig. 7 show the PVA concentration (left) and the COD concentration (right) in each reactor measured according to the conventional method, and the lower two graphs show the PV during operation. A load (left) and COD load (right) are shown.
  • the PVA concentration and COD concentration in each tank are lower in the order of conditioning tank, tank I, tank II, and discharged water, and the lower the downstream of the system, the better the system is. It worked. Operating on day 8, but increased the amount of waste water flowing into the system from 85 m 3 Z Date 0. to 1. 42m 3 Z date, P VA concentration and CO D concentration of the released water hardly changes. As shown in Figure 2 below, the PVA treatment efficiency and CDD treatment efficiency (I + II + III) of the system on the 9th day of operation were about 0.1 kgZm 3 Z It was about 0.30.1 kg / m 3 / day.
  • zeolite and lm 1 of buffer solution were mixed (10% (wXv)), and the mixture was vigorously stirred at 4 ° C overnight. Thereafter, the mixture was centrifuged twice at about 20,000 Xg for 20 minutes, and the supernatant was collected and analyzed using ICP (inductively coupled plasma). The results are shown below.
  • Example 5 The bactericidal effect of zeolite was tested.
  • Cu-type zeolite and Ag-type zeolite (zeolite RA-1) were added to a suspension of E. coli of about 300,000 cells Zml, and changes in the number of viable cells were observed.
  • Cu-type zeolite showed almost no bactericidal effect.
  • Ag-type zeolites showed high bactericidal activity (Fig. 9).
  • zeolites (Zeomighty) was compared. Approximately 120,000 cells A variety of zeolites (0.04%) were added to a Zml suspension of Escherichia coli, and after a certain period of time (initial, 1 hour, 3 hours, 6 hours), the number of viable cells was observed. . As a result, zeolites that carry only silver ions (RA-1, RA-2, RA-3, and RA-4) have better sterilization than zeolites (zeomite) that carry both silver and copper ions. The effect was shown (Table 2).
  • RA-1 and Zeomighty were compared at different concentrations.
  • zeolite carrying only silver ions (RA-1) exhibited a better bactericidal effect than zeolite carrying both silver ions and copper ions (zeomite) (Table 1). 3) (Comparison of performance when adding zeolite)
  • Escherichia coli 15 125 Pseudomonas aeruginosa 20 125 Salmonella typhi murium 15 125 Thiobacillus thioocidans 10 50 (Tiobacillus)
  • the bactericidal effect of zeolite was observed not only in treated wastewater but also in seawater with high salt concentration, as shown in the following results.
  • LB medium nutrient medium
  • MA medium artificial seawater medium
  • MA + YT medium MA medium + yeast extract 0.05%)
  • agar A medium was prepared.
  • seawater samples of Osaka Bay Seawater and Kobe Port Seawater were tested, the bacterial count and bacterial species (yellow, orange, white, etc.) (Judgment based on the color of the colony).
  • the MA + YT medium was used hereafter.
  • a wastewater treatment system using strong oxidative degradation bacteria will be provided. Many of these bacterial groups are relatively large-sized aerobic bacteria belonging to the genera Bacillus and Arsulopactor, which grow rapidly and secrete highly active enzymes out of the cells. And can be completely decomposed into water.
  • the wastewater treatment system of the present invention provides advantages as a wastewater treatment system, such as easy formation of bacterial cell flocs and easy management and generation of excess sludge.
  • the high-concentration oxygen supply means provides a strong air (oxygen) supply to cultivate strong oxidative degradation bacteria at a high concentration and maintain the complete oxidative decomposition activity of organic matter.
  • This high-concentration oxygen providing means prevents the decomposition activity of the strongly degrading bacteria present at a high concentration in the aeration tank from being limited by oxygen supply.
  • the solid-liquid separation means enables wastewater treatment with a high concentration of microorganisms exceeding about 13,000,000 ppm by solid-liquid separation.
  • the wastewater contains a large amount of fats and oils, it does not cause any problems in the treatment system, and it has been difficult to remove the nitrogen and heavy metals, and the altitude has been sterilized. It has become possible to provide treated wastewater.

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  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Water Supply & Treatment (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Activated Sludge Processes (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

L'invention concerne un système de traitement d'eaux usées extrêmement rapide ne produisant pas de boues et équipé de moyens de culture de bactéries de digestion par oxydation, de moyens servant à alimenter ce système en oxygène à concentration élevée et de moyens de séparation solides/liquides. Ces moyens d'alimentation en oxygène très concentré peuvent posséder un ensemble d'alimentation en oxygène et un ensemble de génération de bulles fines. Ces derniers moyens permettent de générer des bulles dont le diamètre est égal à 3 νm maximum. Les moyens de séparation de solides et de liquides peuvent comporter une membrane poreuse. Dans un mode de réalisation préféré, la bactérie de digestion par forte oxydation peut consister en un bacille démontrant une vitesse de croissance exprimée en durée de génération dans un milieu de culture complet à 30 °C égale ou inférieure à 30 minutes, ce bacille appartenant au genre Bacillus. Cette bactérie de digestion peut également consister en une bactérie de digestion PVA appartenant au genre Pseudomonas ou Acinetobacter. L'invention concerne également un système de traitement des eaux usées extrêmement rapide ne produisant pas de boues et équipé de moyens de suppression d'huile, de moyens de suppression d'azote, de moyens de suppression des métaux lourds ainsi que de moyens de stérilisation et de désodorisation.
PCT/JP2004/003136 2003-03-10 2004-03-10 Systeme de traitement d'eaux usees tres rapide ne produisant pas de boues Ceased WO2004080903A1 (fr)

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WO2006072845A3 (fr) * 2004-12-02 2007-03-01 Csir Proteine de recombinaison gram-positives pour la production de bacteries
CN103740621A (zh) * 2014-01-06 2014-04-23 江南大学 一株可降解pva的不动杆菌菌株
CN105331552A (zh) * 2014-08-13 2016-02-17 广州中国科学院先进技术研究所 一株高效脱氮不动杆菌新种及其应用
CN105439372A (zh) * 2014-08-19 2016-03-30 中国石油化工股份有限公司 一种pva废水的新型处理方法
CN111635010A (zh) * 2020-05-21 2020-09-08 常州工程职业技术学院 生态浮床以及水体净化方法

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JP4826982B2 (ja) * 2007-11-30 2011-11-30 明 池知 廃水処理方法
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JP4523671B1 (ja) * 2008-12-02 2010-08-11 昭三 片倉 汚水処理システム及び微細気泡発生器
KR100925531B1 (ko) 2009-01-14 2009-11-05 임찬호 폐수 처리를 위한 마이크로 버블 반응기
JP5948651B2 (ja) * 2010-12-24 2016-07-06 パナソニックＩｐマネジメント株式会社 余剰汚泥の発生抑制方法、及び有機排水処理方法
JP2012245497A (ja) * 2011-05-31 2012-12-13 Miki Riken Kogyo Kk 廃水処理方法及び廃水処理装置
JP2015013255A (ja) * 2013-07-04 2015-01-22 住友電気工業株式会社 汚水浄化処理方法及び汚水浄化処理装置

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WO2006072845A3 (fr) * 2004-12-02 2007-03-01 Csir Proteine de recombinaison gram-positives pour la production de bacteries
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CN103740621A (zh) * 2014-01-06 2014-04-23 江南大学 一株可降解pva的不动杆菌菌株
CN105331552A (zh) * 2014-08-13 2016-02-17 广州中国科学院先进技术研究所 一株高效脱氮不动杆菌新种及其应用
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CN105439372A (zh) * 2014-08-19 2016-03-30 中国石油化工股份有限公司 一种pva废水的新型处理方法
CN111635010A (zh) * 2020-05-21 2020-09-08 常州工程职业技术学院 生态浮床以及水体净化方法

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