WO2012124675A1 - Device and method for biological treatment of organic wastewater - Google Patents
Device and method for biological treatment of organic wastewater Download PDFInfo
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- WO2012124675A1 WO2012124675A1 PCT/JP2012/056364 JP2012056364W WO2012124675A1 WO 2012124675 A1 WO2012124675 A1 WO 2012124675A1 JP 2012056364 W JP2012056364 W JP 2012056364W WO 2012124675 A1 WO2012124675 A1 WO 2012124675A1
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/06—Aerobic processes using submerged filters
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1205—Particular type of activated sludge processes
- C02F3/121—Multistep treatment
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/001—Upstream control, i.e. monitoring for predictive control
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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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
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
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- 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 biological treatment method and apparatus for organic wastewater that can be used for treatment of organic wastewater in a wide concentration range including domestic wastewater, sewage, food factories and pulp factories.
- the present invention relates to a biological treatment method and apparatus for organic wastewater that can improve the treatment efficiency and reduce the amount of excess sludge generation without deteriorating water quality.
- the activated sludge method used when biologically treating organic wastewater is widely used for sewage treatment, industrial wastewater treatment, and the like because of its advantages such as good treated water quality and easy maintenance.
- the BOD volumetric load in the activated sludge method is generally about 0.5 to 0.8 kg / m 3 / d, a large site area is required. Further, since 20 to 40% of the decomposed BOD is converted into microbial cells, that is, sludge, a large amount of excess sludge is generated.
- a fluidized bed method in which a carrier is added As a method for treating organic wastewater with a high load, a fluidized bed method in which a carrier is added is known. In this method, it is possible to operate with a BOD volume load of 3 kg / m 3 / d or more. However, in this method, the amount of generated sludge is about 30 to 50% of the decomposed BOD, which is larger than the normal activated sludge method.
- Japanese Patent Application Laid-Open No. 2000-210692 proposes a countermeasure for deterioration in processing performance due to fluctuations in the quality of raw water, which is a problem in the processing method of Japanese Patent Application Laid-Open No. 55-20649.
- “adjust BOD fluctuation of treated water to within 50% from median average concentration”, “measure water quality in first treatment tank and first treated water over time”, Methods such as “add seed sludge or microbial preparation to the first treatment tank when the quality of the first treated water deteriorates” have been proposed.
- JP-A-2006-51414, JP-A-2006-51415, JP-A-2006-247494, JP-A-2008-36580, and JP-A-2009-202115 also describe a multi-stage activated sludge method using the predatory action of micro-animals.
- the multistage activated sludge method using the predatory action of such minute animals is actually used for organic wastewater treatment.
- the treatment efficiency is improved and the amount of generated sludge is reduced by about 50%. Is possible.
- the biological treatment tank can be downsized by increasing the tank load.
- the quality of the treated water deteriorates. That is, when the organic matter contained in the wastewater is converted into dispersed cells in the biological treatment tank in the previous stage, and the dispersed cells are preyed on by the minute animals in the biological treatment tank in the subsequent stage, the amount of minute animals is less than the amount of dispersed cells. In some cases, leftovers are generated, and the wastewater does not settle in the settling tank and flows into the treated water.
- micro-animals that contribute to sludge reduction: the filtration predation type and the aggregate predation type.
- the aggregate predation type micro-animal can be preyed while gnawing the flocked sludge. Therefore, when the aggregate predation type micro-animal is prioritized, the quality of the treated water is deteriorated. Therefore, in order to improve the quality of treated water, it is effective to give priority to the filter predation type among micro-animals.
- no method has been proposed for controlling the growth of filtration predation type micro-animals and the growth of aggregate predation type micro-animals, and sludge reduction using micro-animals is performed particularly in wastewater treatment at high loads. In some cases, depending on the operating conditions, an unexpected deterioration of the treated water occurs.
- the present invention solves the above conventional problems, the multistage activated sludge method using predation action of micro animals, COD Cr volumetric loading 1.0kg / m 3 / d or more, or BOD volume load 0.5 kg / m 3 /
- the filter predation type micro-animal is positively prioritized, and the growth of the aggregate predation type micro-animal causing deterioration of the treated water is suppressed, the treatment efficiency is improved, sludge
- the present inventors have provided a tank for treating organic matter in a transient manner in the biological treatment tank in the previous stage in the multistage activated sludge method utilizing the predatory action of micro-animals,
- a tank for treating organic matter in a transient manner in the biological treatment tank in the previous stage in the multistage activated sludge method utilizing the predatory action of micro-animals
- the sludge is extracted with a residence time that exceeds the growth rate of the aggregate-feeding type micro-animal, and the micro-animal holding carrier is provided in this biological treatment tank to efficiently feed the dispersal bacteria and separate the sludge into solid and liquid. It has been found that a stable high-load treatment can be achieved by holding a fixed filtration predation type micro-animal that contributes to improving the quality and quality of treated water.
- the present invention has been achieved based on such knowledge.
- the load on the whole biological treatment tank is aerobic with a COD Cr volumetric load of 1.0 kg / m 3 / d or higher or a BOD volumetric load of 0.5 kg / m 3 / d or higher.
- a biological treatment method for organic wastewater that performs biological treatment under conditions, wherein the aerobic biological treatment tank is provided in two or more stages, and the organic wastewater is introduced into the first biological treatment tank and biological treatment is performed by bacteria.
- the first biological treatment water containing the dispersed bacteria from the first biological treatment tank is passed through the biological treatment tank after the second biological treatment tank for biological treatment, and the biological substance after the second biological treatment tank
- the treated water in the treatment tank is solid-liquid separated in a sedimentation tank, and a part of the separated sludge is returned to the biological treatment tank after the second biological treatment tank.
- a carrier for holding a micro animal is provided in the biological treatment tank.
- the load on the whole biological treatment tank is aerobic with a COD Cr volumetric load of 1.0 kg / m 3 / d or higher or a BOD volumetric load of 0.5 kg / m 3 / d or higher.
- This is an organic wastewater biological treatment device that performs biological treatment under conditions, and has two or more aerobic biological treatment tanks. The organic wastewater is introduced into the first biological treatment tank and biologically treated with bacteria.
- the first biological treatment water containing the dispersed bacteria from the first biological treatment tank is passed through the biological treatment tank after the second biological treatment tank for biological treatment, and the biological treatment tank after the second biological treatment tank
- a biological treatment apparatus for organic wastewater that separates the treated water into a solid-liquid separation in a sedimentation tank and returns a part of the separated sludge to the biological treatment tank after the second biological treatment tank.
- a carrier for holding a micro animal is provided in the treatment tank.
- the soluble BOD sludge load on the sludge in the biological treatment tank after the second biological treatment tank is preferably 0.025 to 0.050 kg / kg-MLSS / d.
- the carrier provided in the biological treatment tank after the second biological treatment tank is preferably a carrier in which at least a part of the carrier is fixed to the biological treatment tank directly or via a fixture.
- a part of the organic waste water may be introduced into the biological treatment tank after the second biological treatment tank without passing through the first biological treatment tank.
- the SRT (solid content residence time) of the biological treatment tanks after the second biological treatment tank is preferably 50 days or less, particularly preferably 10 to 50 days.
- a multi-stage utilizing the predatory action of a micro animal even in a high load treatment such as a COD Cr volumetric load of 1.0 kg / m 3 / d or higher or a BOD volumetric load of 0.5 kg / m 3 / d or higher.
- an aggregate that deteriorates the quality of treated water by providing a micro-animal holding carrier in a biological treatment tank that holds micro-animals and withdrawing sludge with a residence time that exceeds the growth rate of aggregate-feeding micro-animals
- the growth of predatory type micro-animals is suppressed, and in this biological treatment tank, fixed filtration predatory type micro-animals that contribute to improving the quality of treated water by improving the quality of treated water by efficiently feeding on dispersal bacteria. It becomes possible to hold it stably.
- 1 and 2 are system diagrams showing an embodiment of a biological treatment method and apparatus for organic wastewater according to the present invention.
- 1 is a first biological treatment tank
- 2 is a second biological treatment tank
- 3 is a precipitation tank
- 11 and 21 are aeration tubes
- 22 is a micro-animal holding carrier.
- the same reference numerals are given to members that perform the following.
- raw water organic wastewater
- 70% or more, desirably 80% of the organic component (soluble BOD) is obtained by dispersible bacteria (non-aggregating bacteria). More preferably, 85% or more is oxidatively decomposed.
- the pH of the first biological treatment tank 1 is 6 or more, preferably 8 or less. However, the pH may be 8 or more when the raw water such as food manufacturing wastewater contains a lot of oil, or when the raw water such as semiconductor manufacturing wastewater or liquid crystal manufacturing wastewater contains a lot of organic solvent or cleaning agent.
- the water flow to the first biological treatment tank 1 is preferably a transient type.
- the BOD volumetric load of the first biological treatment tank 1 is 1 kg / m 3 / d or more, for example 1 to 20 kg / m 3 / d
- HRT raw water residence time
- treated water in which dispersible bacteria are dominant can be obtained, and waste water having a low BOD concentration can be treated with a high load by shortening the HRT.
- the shape of the carrier is arbitrary such as a spherical shape, a pellet shape, a hollow cylindrical shape, a thread shape, a plate shape, etc., and the size is also arbitrary within a diameter of about 0.1 to 10 mm. is there.
- the material of the carrier is any material such as a natural material, an inorganic material, and a polymer material, and a gel material may be used.
- carrier added to the 1st biological treatment tank 1 is high, a dispersal microbe does not produce
- This first biological treatment tank 1 may suppress the growth of filamentous bacteria by setting the dissolved oxygen (DO) concentration to 1 mg / L or less, preferably 0.5 mg / L or less.
- DO dissolved oxygen
- the decomposition rate of the organic component in the first biological treatment tank 1 is not 100% but 95% or less, desirably 85 to 90%.
- the treated water in the first biological treatment tank 1 (first biological treated water) is passed through the second biological treatment tank 2 in the subsequent stage, where the remaining organic components are oxidatively decomposed and the dispersible bacteria are self-degraded. And reduce excess sludge by predation of micro-animals.
- this 2nd biological treatment tank 2 is good also as a multistage structure of two or more tanks.
- a minute animal holding carrier 22 is provided in the second biological treatment tank 2. Furthermore, by setting the soluble BOD sludge load to the sludge in the tank to 0.025 to 0.050 kg / kg-MLSS / d, it is possible to efficiently prey on micro-animals, especially dispersal bacteria, and to separate the sludge into solid and liquid. Increases the amount of fixed filtration predatory micro-animals retained in the tank that contributes to improved treated water quality.
- the second biological treatment tank 2 not only the filtration predation type micro-animal that prey on the dispersed cells, but also the aggregate predation type micro-animal that can prey on the flocked sludge grows. Since the latter prey on flocs while swimming, if prioritized, sludge is eaten and becomes sludge in which fine floc pieces are scattered. This floc piece deteriorates the quality of treated water. Therefore, in the present invention, in the second biological treatment tank 2, the soluble BOD sludge load with respect to the sludge in the tank is set to 0.025 to 0.050 kg / kg-MLSS / d.
- the SRT (solid content retention time) of the second biological treatment tank 2 is desirably 50 days or less, particularly 45 days or less, particularly 40 days or less. Further, it is desirably controlled to be constant within a range of 10 days or more, particularly 20 days or more.
- SRT (floating sludge concentration in tank / aeration tank volume) / (drawing sludge concentration / drawing amount per day).
- a micro animal holding carrier 22 is provided in the second biological treatment tank 2. That is, this kind of micro animal is fixed to the sludge floc and maintained in the system, but since the sludge is drawn out of the system with a certain residence time, it is necessary to provide a supply source in the system. At this time, if the carrier is a granular or square fluidized bed, the shearing force for fluidization cannot stably maintain a high concentration, so the carrier filling rate must be increased.
- the carrier provided in the second biological treatment tank 2 is not a fluid carrier, but at least a part of the carrier is directly or fixed to any one of the bottom surface, the side surface, the upper part and the like of the second biological treatment tank 2. It is preferable to use a fixed carrier that is fixed via a gap.
- the shape of the carrier 22 is arbitrary such as a thread shape, a plate shape, or a strip shape.
- the material of the carrier 22 is arbitrary such as a natural material, an inorganic material, or a polymer material, and a gel material may be used. Desirably, it is a synthetic resin foam such as porous polyurethane foam.
- the carrier preferably has a plate shape or strip shape having a side length of 100 to 400 cm, a side length orthogonal to the length of 5 to 200 cm, and a thickness of 0.5 to 5 cm.
- the left and right ends of the sheet-like fixing carrier are respectively fixed to two rod-shaped fixtures 23 that are fixed to the bottom surface of the second biological treatment tank 2 in a vertical direction.
- the filling rate of the carrier is excessively high, mixing in the tank, sludge decay, etc. may occur.
- the filling rate is preferably about 0.1 to 20%.
- the oxidative decomposition is performed in a subsequent treatment tank. It is known that when oxidative degradation of organic matter by bacteria occurs in the second biological treatment tank 2 where a large amount of micro animals are present, as a countermeasure to escape from predation of micro animals, it grows in a form that is difficult to be predated. The bacterial group thus grown is not preyed on by the micro-animals, and their decomposition depends only on autolysis, and the effect of reducing the amount of sludge generated is reduced.
- the first biological treatment tank it is necessary to decompose most of the organic matter, that is, 70% or more of the raw water BOD, desirably 80% or more, and convert it into cells. Therefore, it is preferable to operate at 0.025 to 0.050 kg / kg-MLSS / d in terms of the sludge load in the tank by the soluble BOD in the subsequent biological treatment tank. If the soluble BOD sludge load on the sludge in the tank is larger than 0.050 kg / kg-MLSS / d, the sludge reduction effect is impaired, and if it falls below 0.025 kg / kg-MLSS / d, the sedimentation separation is performed in the settling tank. There are things that cannot be done.
- the tank sludge is the sum of floating sludge and carrier-attached sludge.
- the treated water from the second biological treatment tank 2 is fed to the precipitation tank 3 for solid-liquid separation, and the separated water is taken out as treated water, and a part of the separated sludge is removed from the second biological treatment tank 2.
- the upstream which may be the second biological treatment tank 2
- the remainder is discharged out of the system as surplus sludge.
- the aspect shown in FIG. 2 is that a part of raw water, for example, about 5 to 50%, especially about 5 to 20%, is directly introduced into the second biological treatment tank 2 without passing through the first biological treatment tank 1.
- a part of raw water for example, about 5 to 50%, especially about 5 to 20%
- an effect of avoiding the load shortage of the second biological treatment tank when the raw water fluctuates (when the load is reduced) is achieved.
- first biological treatment tank and the second biological treatment tank may have a multi-stage configuration of two or more stages as described above. Therefore, in the present invention, the biological treatment tank may be provided in three or more stages.
- the load on the whole biological treatment tank is a high load such as a COD Cr volumetric load of 1.0 kg / m 3 / d or higher or a BOD volumetric load of 0.5 kg / m 3 / d or higher.
- a micro animal holding carrier is provided in the biological treatment tank after the second biological treatment tank, and the soluble BOD sludge load with respect to the sludge in the tank is set to 0.025 to 0.050 kg / kg-MLSS / d.
- Example 1 As shown in FIG. 1, the present invention uses an experimental apparatus in which a first biological treatment tank 1 with a capacity of 36 L, a second biological treatment tank 2 with a capacity of 150 L, and a sedimentation tank 3 with a capacity of 50 L are connected.
- Treatment of organic wastewater by The raw water contains artificial substrate of COD Cr : 2000 mg / L, BOD: 1280 mg / L.
- the treatment conditions for each biological treatment tank were as follows.
- plate-like polyurethane foam (100 cm ⁇ 30 cm ⁇ 1 cm / 1 sheet) is used as the carrier 12 of the second biological treatment tank 2, and it is in a position symmetrical to the air diffuser 21 with respect to the vertical plane at the center of the tank. The bottom and the left and right sides were fixed to the tank wall surface.
- the BOD volumetric load of the entire apparatus is 1.5 kg-BOD / m 3 / d
- the HRT of the entire apparatus is 21 h
- the soluble BOD sludge load for the sludge in the tank of the second biological treatment tank 2 is 0 0.046 kg / kg-MLSS / d.
- the sludge floc in the second biological treatment tank 2 and the filterable predatory micro-animals are prioritized as the carrier, and the sludge conversion rate is 0.10 kg-MLSS / kg-COD Cr. It was.
- the quality of the treated water was always in good condition throughout the test period, with a soluble COD Cr concentration of less than 50 mg / L and SS of less than 20 mg / L.
- Example 1 The treatment was performed under the same conditions as in Example 1 except that the carrier was not provided in the second biological treatment tank.
- Raw water quality, treatment conditions of the first and second biological treatment tanks, overall BOD volumetric load and HRT are the same as in Example 1.
- the sludge conversion rate was 0.10kg-MLSS / kg-COD Cr .
- the quality of treated water deteriorated due to the predominance of the number of aggregate predatory micro-animals, and the solubility COD Cr of treated water was 80 mg / L or more and treated water SS was 50 mg / L or more throughout the test period. .
- Example 2 Using raw water containing artificial substrates of COD Cr : 670 mg / L, BOD: 430 mg / L, BOD volume load on the first biological treatment tank: 2.6 kg-BOD / m 3 / d, overall BOD volume load: 0.5kg-BOD / m 3 /d(0.78kg-CODcr/m 3 / d), HRT21h, soluble BOD sludge load on intracisternal sludge in the second biological treatment tank 0.025 kg / kg-MLSS The treatment was performed under the same conditions as in Example 1 except that the operation was performed under the conditions of / d.
- the sludge floc of the second biological treatment tank and the filter-precipitating microanimals were prioritized for the carrier, and the sludge conversion rate was 0.08 kg-MLSS / kg-COD Cr .
- the treated water quality was always in good condition throughout the test period, with the soluble COD Cr concentration being less than 30 mg / L and the SS being less than 10 mg / L.
- Example 2 The treatment was performed under the same conditions as in Example 2 except that the carrier was not provided in the second biological treatment tank.
- Raw water quality, treatment conditions of the first and second biological treatment tanks, overall BOD volumetric load and HRT are the same as in Example 2.
- the sludge conversion rate was 0.08 kg-MLSS / kg-COD Cr .
- the quality of the treated water deteriorated because the number of aggregate predatory micro-animals periodically became dominant, and the treated water-soluble COD Cr was 50 mg / L or more and the treated water SS was 30 mg / L for more than half of the test period. More than L and worse than Example 2.
- Example 3 BOD volume load for the first biological treatment tank: 17.5 kg-BOD / m 3 / d, total BOD volume using raw water containing artificial substrate of COD Cr : 6700 mg / L, BOD: 4350 mg / L Load: 5 kg-BOD / m 3 / d, first biological treatment tank HRT6h, second biological treatment tank HRT15h, carrier filling rate of second biological treatment tank 5%, SRT 50 days, against sludge in tank of second biological treatment tank The treatment was performed under the same conditions as in Example 1 except that the operation was performed under the condition of a soluble BOD sludge load of 0.05 kg / kg-MLSS / d.
- the sludge floc in the second biological treatment tank and the filter-precipitating microanimals were prioritized on the carrier, and the sludge conversion rate was 0.09 kg-MLSS / kg-COD Cr .
- the water quality of the treated water was always in good condition throughout the test period, with a soluble COD Cr concentration of less than 60 mg / L and SS of less than 30 mg / L.
- Example 4 The same raw water as in Example 1 is used, the first biological treatment tank HRT is set to 5.7 h, the second biological treatment tank HRT is set to 17 h, and the BOD volume load on the first biological treatment tank is 5.4 kg-BOD. / M 3 / d, overall BOD volumetric load: 1.5 kg-BOD / m 3 / d, soluble BOD sludge load 0.06 kg for sludge in the tank of the second biological treatment tank by bypassing raw water by 30% The treatment was performed under the same conditions as in Example 1 except that the operation was performed under the conditions of / kg-MLSS / d.
- the sludge floc in the second biological treatment tank and the fixed filter-predatory microanimals were prioritized on the carrier, and the sludge conversion rate was 0.11 kg-MLSS / kg-COD Cr .
- the water quality of the treated water was always in good condition throughout the test period, with a soluble COD Cr concentration of less than 60 mg / L and SS of less than 30 mg / L.
- the carrier of the second biological treatment tank is a fluidized bed sponge carrier (carrier filling rate is 2%), and the soluble BOD sludge load with respect to the sludge in the second biological treatment tank SRT 30 days is 0.04 kg /
- the treatment was performed under the same conditions as in Example 1 except that the operation was performed under the conditions of kg-MLSS / d.
- the sludge floc in the second biological treatment tank and the fixed filter-predatory microanimals (Vorticella elegans, stag beetle) were prioritized on the carrier, and the sludge conversion rate was 0.11 kg-MLSS / kg-COD Cr .
- the water quality of the treated water was always in good condition throughout the test period with a soluble COD Cr concentration of less than 50 mg / L and SS of less than 30 mg / L.
- Example 5 the wastewater could be treated almost satisfactorily, but it was confirmed that the number of micro-animals fixed on the carrier was small.
- Example 6 treatment was performed under the same conditions as in Example 2 except that 10% of the raw water was directly supplied to the second biological treatment tank and the SRT of the second biological treatment tank was 45 days. It was. As a result, the sludge floc in the second biological treatment tank and the filter-precipitating micro-animals (Torbitus, scallop) were prioritized as the carrier, and the sludge conversion rate was 0.07 kg-MLSS / kg-COD Cr . The treated water quality was always in good condition throughout the test period, with the soluble COD Cr concentration being less than 30 mg / L and the SS being less than 10 mg / L.
- Example 6 From Example 6, it was confirmed that even when a portion of the raw water was bypassed, treated water having a quality equal to or higher than that obtained when bypassing was not obtained.
- Example 7 The same raw water as in Example 1 is used as the first biological treatment tank HRT4h, the second biological treatment tank HRT17h, the second biological treatment tank SRT is 60 days, the solubility BOD for the sludge in the tank of the second biological treatment tank
- the treatment was performed under the same conditions as in Example 1 except that the operation was performed under the condition of a sludge load of 0.03 kg / kg-MLSS / d.
- the sludge floc of the second biological treatment tank and the filter-precipitating microanimals (Telephanus, Hirugattamushi) were prioritized for the carrier, and the sludge conversion rate was 0.08 kg-MLSS / kg-COD Cr .
- the quality of the treated water was always in good condition at all times during the test period, with the soluble COD Cr concentration being less than 70 mg / L and the SS being less than 50 mg / L. However, it was confirmed that the number of micro-animals fixed on the carrier was smaller than that in Example 1.
Abstract
Description
1)排水処理時に発生する汚泥の大幅な減量化
2)高負荷運転による処理効率の向上
3)安定した処理水質の維持 For this reason, according to this invention, the efficient biological treatment of organic waste_water | drain becomes possible, and the following effects are show | played.
1) Significant reduction of sludge generated during wastewater treatment 2) Improvement of treatment efficiency by high load operation 3) Maintenance of stable treated water quality
図1,2において、1は第一生物処理槽、2は第二生物処理槽、3は沈殿槽、11,21は散気管、22は微小動物保持担体であり、図1,2において同一機能を奏する部材には同一符号を付してある。 1 and 2 are system diagrams showing an embodiment of a biological treatment method and apparatus for organic wastewater according to the present invention.
1 and 2, 1 is a first biological treatment tank, 2 is a second biological treatment tank, 3 is a precipitation tank, 11 and 21 are aeration tubes, and 22 is a micro-animal holding carrier. The same reference numerals are given to members that perform the following.
図1に示す如く、容量が36Lの第一生物処理槽1と、容量が150Lの第二生物処理槽2と、容量が50Lの沈殿槽3とを連結させた実験装置を用いて、本発明による有機性排水の処理を行った。原水は、CODCr:2000mg/L,BOD:1280mg/Lの人口基質を含むものである。
各生物処理槽の処理条件は次の通りとした。 [Example 1]
As shown in FIG. 1, the present invention uses an experimental apparatus in which a first biological treatment tank 1 with a capacity of 36 L, a second
The treatment conditions for each biological treatment tank were as follows.
DO:0.5mg/L
BOD容積負荷:7.7kg-BOD/m3/d
HRT:4h
pH:7.0
<第二生物処理槽>
DO:4mg/L
担体充填率:2%
HRT:17h
SRT:25日
pH:7.0 <First biological treatment tank>
DO: 0.5 mg / L
BOD volumetric load: 7.7 kg-BOD / m 3 / d
HRT: 4h
pH: 7.0
<Second biological treatment tank>
DO: 4 mg / L
Carrier filling rate: 2%
HRT: 17h
SRT: 25 days pH: 7.0
また、装置全体でのBOD容積負荷は1.5kg-BOD/m3/dであり、装置全体でのHRTは21hで、第二生物処理槽2の槽内汚泥に対する溶解性BOD汚泥負荷は0.046kg/kg-MLSS/dであった。 In addition, plate-like polyurethane foam (100 cm × 30 cm × 1 cm / 1 sheet) is used as the carrier 12 of the second
Further, the BOD volumetric load of the entire apparatus is 1.5 kg-BOD / m 3 / d, the HRT of the entire apparatus is 21 h, and the soluble BOD sludge load for the sludge in the tank of the second
処理水(沈殿槽3の分離水)水質は、溶解性CODCr濃度が50mg/L未満、SSが20mg/L未満と、試験期間中、常時良好な状態を維持していた。 As a result, the sludge floc in the second
The quality of the treated water (separated water in the precipitation tank 3) was always in good condition throughout the test period, with a soluble COD Cr concentration of less than 50 mg / L and SS of less than 20 mg / L.
第二生物処理槽に担体を設けなかったこと以外は実施例1と同様の条件で処理を行った。
原水の水質、第一、第二生物処理槽の処理条件並びに全体のBOD容積負荷及びHRTは実施例1と同一である。
その結果、汚泥転換率は0.10kg-MLSS/kg-CODCrとなった。しかしながら、凝集体捕食型微小動物数が優占化したことで処理水質は悪化し、試験期間を通じて、処理水の溶解性CODCrは80mg/L以上、処理水SSは50mg/L以上と悪かった。 [Comparative Example 1]
The treatment was performed under the same conditions as in Example 1 except that the carrier was not provided in the second biological treatment tank.
Raw water quality, treatment conditions of the first and second biological treatment tanks, overall BOD volumetric load and HRT are the same as in Example 1.
As a result, the sludge conversion rate was 0.10kg-MLSS / kg-COD Cr . However, the quality of treated water deteriorated due to the predominance of the number of aggregate predatory micro-animals, and the solubility COD Cr of treated water was 80 mg / L or more and treated water SS was 50 mg / L or more throughout the test period. .
原水として、CODCr:670mg/L,BOD:430mg/Lの人工基質を含むものを用い、第一生物処理槽に対するBOD容積負荷:2.6kg-BOD/m3/d、全体でのBOD容積負荷:0.5kg-BOD/m3/d(0.78kg-CODcr/m3/d)、HRT21h、第二生物処理槽の槽内汚泥に対する溶解性BOD汚泥負荷は0.025kg/kg-MLSS/dの条件で運転したこと以外は、実施例1と同様の条件で処理を行った。
その結果、第二生物処理槽の汚泥フロック、担体には固着性の濾過捕食型微小動物(ツリガネムシ、ヒルガタワムシ)が優先化し、汚泥転換率は0.08kg-MLSS/kg-CODCrとなった。処理水質は、溶解性CODCr濃度が30mg/L未満、SSが10mg/L未満と、試験期間中、常時良好な状態を維持していた。 [Example 2]
Using raw water containing artificial substrates of COD Cr : 670 mg / L, BOD: 430 mg / L, BOD volume load on the first biological treatment tank: 2.6 kg-BOD / m 3 / d,
As a result, the sludge floc of the second biological treatment tank and the filter-precipitating microanimals (Telephanus, Hirugattamushi) were prioritized for the carrier, and the sludge conversion rate was 0.08 kg-MLSS / kg-COD Cr . The treated water quality was always in good condition throughout the test period, with the soluble COD Cr concentration being less than 30 mg / L and the SS being less than 10 mg / L.
第二生物処理槽に担体を設けなかったこと以外は実施例2と同様の条件で処理を行った。
原水の水質、第一、第二生物処理槽の処理条件並びに全体のBOD容積負荷及びHRTは実施例2と同一である。
その結果、汚泥転換率は0.08kg-MLSS/kg-CODCrとなった。しかしながら、凝集体捕食型微小動物数が定期的に優占化したことで処理水質は悪化し、試験期間の半分以上は、処理水溶解性CODCrが50mg/L以上、処理水SSは30mg/L以上と実施例2に比べ悪かった。 [Comparative Example 2]
The treatment was performed under the same conditions as in Example 2 except that the carrier was not provided in the second biological treatment tank.
Raw water quality, treatment conditions of the first and second biological treatment tanks, overall BOD volumetric load and HRT are the same as in Example 2.
As a result, the sludge conversion rate was 0.08 kg-MLSS / kg-COD Cr . However, the quality of the treated water deteriorated because the number of aggregate predatory micro-animals periodically became dominant, and the treated water-soluble COD Cr was 50 mg / L or more and the treated water SS was 30 mg / L for more than half of the test period. More than L and worse than Example 2.
原水として、CODCr:6700mg/L,BOD:4350mg/Lの人工基質を含むものを用い、第一生物処理槽に対するBOD容積負荷:17.5kg-BOD/m3/d、全体でのBOD容積負荷:5kg-BOD/m3/d、第一生物処理槽HRT6h、第二生物処理槽HRT15h、第二生物処理槽の担体充填率5%、SRT50日、第二生物処理槽の槽内汚泥に対する溶解性BOD汚泥負荷0.05kg/kg-MLSS/dの条件で運転したこと以外は、実施例1と同様の条件で処理を行った。
その結果、第二生物処理槽の汚泥フロック、担体には固着性の濾過捕食型微小動物(ツリガネムシ、ヒルガタワムシ)が優先化し、汚泥転換率は0.09kg-MLSS/kg-CODCrとなった。処理水質は、溶解性CODCr濃度が60mg/L未満、SSが30mg/L未満と、試験期間中、常時ほぼ良好な状態を維持していた。 [Example 3]
BOD volume load for the first biological treatment tank: 17.5 kg-BOD / m 3 / d, total BOD volume using raw water containing artificial substrate of COD Cr : 6700 mg / L, BOD: 4350 mg / L Load: 5 kg-BOD / m 3 / d, first biological treatment tank HRT6h, second biological treatment tank HRT15h, carrier filling rate of second biological treatment tank 5%, SRT 50 days, against sludge in tank of second biological treatment tank The treatment was performed under the same conditions as in Example 1 except that the operation was performed under the condition of a soluble BOD sludge load of 0.05 kg / kg-MLSS / d.
As a result, the sludge floc in the second biological treatment tank and the filter-precipitating microanimals (Villus elegans, scallop) were prioritized on the carrier, and the sludge conversion rate was 0.09 kg-MLSS / kg-COD Cr . The water quality of the treated water was always in good condition throughout the test period, with a soluble COD Cr concentration of less than 60 mg / L and SS of less than 30 mg / L.
第二生物処理槽に担体を設けず、原水として、CODCr:550mg/L,BOD:350mg/Lの人工基質を含むものを用い、第一生物処理槽に対するBOD容積負荷:2.1kg-BOD/m3/d、全体でのBOD容積負荷:0.4kg-BOD/m3/d、第二生物処理槽の槽内汚泥に対する溶解性BOD汚泥負荷0.025kg/kg-MLSS/dの条件で運転したこと以外は、実施例1と同様の条件で処理を行った。
その結果、第二生物処理槽の汚泥フロック、担体には固着性の濾過捕食型微小動物(ツリガネムシ、ヒルガタワムシ)が優先化し、汚泥転換率は0.08kg-MLSS/kg-CODCrとなった。処理水質は、溶解性CODCr濃度が30mg/L未満、SSが10mg/L未満と、試験期間中、常時良好な状態を維持していた。 [Comparative Example 3]
No carrier is provided in the second biological treatment tank, and raw water containing an artificial substrate of COD Cr : 550 mg / L, BOD: 350 mg / L is used. BOD volumetric load on the first biological treatment tank: 2.1 kg-BOD / M 3 / d, overall BOD volumetric load: 0.4 kg-BOD / m 3 / d, soluble BOD sludge load 0.025 kg / kg-MLSS / d with respect to sludge in the tank of the second biological treatment tank The treatment was performed under the same conditions as in Example 1 except that the operation was performed at
As a result, the sludge floc of the second biological treatment tank and the filter-precipitating microanimals (Telephanus, Hirugattamushi) were prioritized for the carrier, and the sludge conversion rate was 0.08 kg-MLSS / kg-COD Cr . The treated water quality was always in good condition throughout the test period, with the soluble COD Cr concentration being less than 30 mg / L and the SS being less than 10 mg / L.
原水として、実施例1と同一のものを用い、第一生物処理槽HRTを5.7hとし、第二生物処理槽HRTを17hとし、第一生物処理槽に対するBOD容積負荷:5.4kg-BOD/m3/d、全体でのBOD容積負荷:1.5kg-BOD/m3/d、原水を30%バイパスすることで第二生物処理槽の槽内汚泥に対する溶解性BOD汚泥負荷0.06kg/kg-MLSS/dの条件で運転したこと以外は、実施例1と同様の条件で処理を行った。
その結果、第二生物処理槽の汚泥フロック、担体には固着性の濾過捕食型微小動物(ツリガネムシ、ヒルガタワムシ)が優先化し、汚泥転換率は0.11kg-MLSS/kg-CODCrとなった。処理水質は、溶解性CODCr濃度が60mg/L未満、SSが30mg/L未満と、試験期間中、常時ほぼ良好な状態を維持していた。 [Example 4]
The same raw water as in Example 1 is used, the first biological treatment tank HRT is set to 5.7 h, the second biological treatment tank HRT is set to 17 h, and the BOD volume load on the first biological treatment tank is 5.4 kg-BOD. / M 3 / d, overall BOD volumetric load: 1.5 kg-BOD / m 3 / d, soluble BOD sludge load 0.06 kg for sludge in the tank of the second biological treatment tank by bypassing raw water by 30% The treatment was performed under the same conditions as in Example 1 except that the operation was performed under the conditions of / kg-MLSS / d.
As a result, the sludge floc in the second biological treatment tank and the fixed filter-predatory microanimals (Vorticella elegans, stag beetle) were prioritized on the carrier, and the sludge conversion rate was 0.11 kg-MLSS / kg-COD Cr . The water quality of the treated water was always in good condition throughout the test period, with a soluble COD Cr concentration of less than 60 mg / L and SS of less than 30 mg / L.
第二生物処理槽の担体を流動床スポンジ担体(担体充填率は2%)とし、第二生物処理槽SRT30日、第二生物処理槽の槽内汚泥に対する溶解性BOD汚泥負荷は0.04kg/kg-MLSS/dの条件で運転したこと以外は、実施例1と同様の条件で処理を行った。
その結果、第二生物処理槽の汚泥フロック、担体には固着性の濾過捕食型微小動物(ツリガネムシ、ヒルガタワムシ)が優先化し、汚泥転換率は0.11kg-MLSS/kg-CODCrとなった。処理水質は、溶解性CODCr濃度が50mg/L未満、SSが30mg/L未満と、試験期間中、常時ほぼ良好な状態を維持していた。 [Example 5]
The carrier of the second biological treatment tank is a fluidized bed sponge carrier (carrier filling rate is 2%), and the soluble BOD sludge load with respect to the sludge in the second biological treatment tank SRT 30 days is 0.04 kg / The treatment was performed under the same conditions as in Example 1 except that the operation was performed under the conditions of kg-MLSS / d.
As a result, the sludge floc in the second biological treatment tank and the fixed filter-predatory microanimals (Vorticella elegans, stag beetle) were prioritized on the carrier, and the sludge conversion rate was 0.11 kg-MLSS / kg-COD Cr . The water quality of the treated water was always in good condition throughout the test period with a soluble COD Cr concentration of less than 50 mg / L and SS of less than 30 mg / L.
実施例2において、原水の10%を直接に第二生物処理槽に供給するようにし、第二生物処理槽のSRTを45日としたこと以外は、実施例2と同様の条件で処理を行った。
その結果、第二生物処理槽の汚泥フロック、担体には固着性の濾過捕食型微小動物(ツリガネムシ、ヒルガタワムシ)が優先化し、汚泥転換率は0.07kg-MLSS/kg-CODCrとなった。処理水質は、溶解性CODCr濃度が30mg/L未満、SSが10mg/L未満と、試験期間中、常時良好な状態を維持していた。 [Example 6]
In Example 2, treatment was performed under the same conditions as in Example 2 except that 10% of the raw water was directly supplied to the second biological treatment tank and the SRT of the second biological treatment tank was 45 days. It was.
As a result, the sludge floc in the second biological treatment tank and the filter-precipitating micro-animals (Torbitus, scallop) were prioritized as the carrier, and the sludge conversion rate was 0.07 kg-MLSS / kg-COD Cr . The treated water quality was always in good condition throughout the test period, with the soluble COD Cr concentration being less than 30 mg / L and the SS being less than 10 mg / L.
原水として実施例1と同一のものを用い、第一生物処理槽HRT4h、第二生物処理槽HRT17hとし、第二生物処理槽SRTを60日、第二生物処理槽の槽内汚泥に対する溶解性BOD汚泥負荷0.03kg/kg-MLSS/dの条件で運転したこと以外は、実施例1と同様の条件で処理を行った。
その結果、第二生物処理槽の汚泥フロック、担体には固着性の濾過捕食型微小動物(ツリガネムシ、ヒルガタワムシ)が優先化し、汚泥転換率は0.08kg-MLSS/kg-CODCrとなった。処理水質は、溶解性CODCr濃度が70mg/L未満、SSが50mg/L未満と、試験期間中、常時まずまず良好な状態を維持していた。ただし、担体への微小動物の定着数が実施例1よりも少ないことが認められた。 [Example 7]
The same raw water as in Example 1 is used as the first biological treatment tank HRT4h, the second biological treatment tank HRT17h, the second biological treatment tank SRT is 60 days, the solubility BOD for the sludge in the tank of the second biological treatment tank The treatment was performed under the same conditions as in Example 1 except that the operation was performed under the condition of a sludge load of 0.03 kg / kg-MLSS / d.
As a result, the sludge floc of the second biological treatment tank and the filter-precipitating microanimals (Telephanus, Hirugattamushi) were prioritized for the carrier, and the sludge conversion rate was 0.08 kg-MLSS / kg-COD Cr . The quality of the treated water was always in good condition at all times during the test period, with the soluble COD Cr concentration being less than 70 mg / L and the SS being less than 50 mg / L. However, it was confirmed that the number of micro-animals fixed on the carrier was smaller than that in Example 1.
なお、本出願は、2011年3月16日付で出願された日本特許出願(特願2011-058035)及び2012年1月6日付で出願された日本特許出願(特願2012-001290)に基づいており、その全体が引用により援用される。 Although the present invention has been described in detail using specific embodiments, it will be apparent to those skilled in the art that various modifications can be made without departing from the spirit and scope of the invention.
This application is based on a Japanese patent application filed on March 16, 2011 (Japanese Patent Application No. 2011-058035) and a Japanese patent application filed on January 6, 2012 (Japanese Patent Application No. 2012-001290). Which is incorporated by reference in its entirety.
Claims (11)
- 全生物処理槽の負荷を、CODCr容積負荷1.0kg/m3/d以上又はBOD容積負荷0.5kg/m3/d以上として、好気条件下に生物処理を行う有機性排水の生物処理方法であって、該好気性生物処理槽を二段以上の多段に設け、第一生物処理槽に有機性排水を導入して細菌により生物処理し、該第一生物処理槽からの分散状態の細菌を含む第一生物処理水を第二生物処理槽以降の生物処理槽に通水して生物処理し、該第二生物処理槽以降の生物処理槽の処理水を沈殿槽で固液分離し、分離汚泥の一部を該第二生物処理槽以降の生物処理槽に返送する有機性排水の生物処理方法において、
該第二生物処理槽以降の生物処理槽に微小動物を保持する担体を設けることを特徴とする有機性排水の生物処理方法。 Organic wastewater organisms that perform biological treatment under aerobic conditions with a total biological treatment tank load of COD Cr volumetric load 1.0 kg / m 3 / d or higher or BOD volumetric load 0.5 kg / m 3 / d or higher It is a treatment method, the aerobic biological treatment tank is provided in two or more stages, the organic wastewater is introduced into the first biological treatment tank and biologically treated with bacteria, and the dispersed state from the first biological treatment tank The first biological treatment water containing the bacteria is passed through the biological treatment tank after the second biological treatment tank for biological treatment, and the treated water in the biological treatment tank after the second biological treatment tank is solid-liquid separated in the precipitation tank In the biological treatment method for organic wastewater, a part of the separated sludge is returned to the biological treatment tank after the second biological treatment tank.
A biological treatment method for organic wastewater, wherein a carrier for holding micro-animals is provided in a biological treatment tank after the second biological treatment tank. - 請求項1において、前記第二生物処理槽以降の生物処理槽の槽内汚泥に対する溶解性BOD汚泥負荷を0.025~0.050kg/kg-MLSS/dとすることを特徴とする有機性排水の生物処理方法。 The organic waste water according to claim 1, wherein a soluble BOD sludge load with respect to the sludge in the biological treatment tank after the second biological treatment tank is 0.025 to 0.050 kg / kg-MLSS / d. Biological treatment method.
- 請求項1又は2において、前記第二生物処理槽以降の生物処理槽内に設けられた担体は担体の少なくとも一部が該生物処理槽に直接または固定具を介して固定された担体であることを特徴とする有機性排水の生物処理方法。 3. The carrier provided in the biological treatment tank after the second biological treatment tank according to claim 1 or 2, wherein at least a part of the carrier is fixed to the biological treatment tank directly or via a fixture. A biological treatment method for organic wastewater.
- 請求項1ないし3のいずれか1項において、前記有機性排水の一部を前記第一生物処理槽を経ることなく前記第二生物処理槽以降の生物処理槽に導入することを特徴とする有機性排水の生物処理方法。 The organic material according to any one of claims 1 to 3, wherein a part of the organic waste water is introduced into a biological treatment tank after the second biological treatment tank without passing through the first biological treatment tank. Biological treatment method for effluent.
- 請求項1ないし4のいずれか1項において、前記第二生物処理槽以降の生物処理槽のSRT(固形分滞留時間)が50日以下であることを特徴とする有機性排水の生物処理方法。 The biological treatment method for organic wastewater according to any one of claims 1 to 4, wherein an SRT (solid content retention time) of the biological treatment tanks after the second biological treatment tank is 50 days or less.
- 請求項1ないし4のいずれか1項において、前記第二生物処理槽以降の生物処理槽のSRT(固形分滞留時間)が10~50日であることを特徴とする有機性排水の生物処理方法。 The biological treatment method for organic waste water according to any one of claims 1 to 4, wherein the SRT (solid content retention time) of the biological treatment tanks after the second biological treatment tank is 10 to 50 days. .
- 全生物処理槽の負荷を、CODCr容積負荷1.0kg/m3/d以上又はBOD容積負荷0.5kg/m3/d以上として、好気条件下に生物処理を行う有機性排水の生物処理装置であって、好気性生物処理槽を二段以上の多段に設け、第一生物処理槽に有機性排水を導入して細菌により生物処理し、該第一生物処理槽からの分散状態の細菌を含む第一生物処理水を第二生物処理槽以降の生物処理槽に通水して生物処理し、第二生物処理槽以降の生物処理槽の処理水を沈殿槽で固液分離し、分離汚泥の一部を該第二生物処理槽以降の生物処理槽に返送する有機性排水の生物処理装置において、
該第二生物処理槽以降の生物処理槽に微小動物を保持する担体が設けられていることを特徴とする有機性排水の生物処理装置。 Organic wastewater organisms that perform biological treatment under aerobic conditions with a total biological treatment tank load of COD Cr volumetric load 1.0 kg / m 3 / d or higher or BOD volumetric load 0.5 kg / m 3 / d or higher It is a treatment device, provided with aerobic biological treatment tanks in two or more stages, introduced organic wastewater into the first biological treatment tank and biologically treated with bacteria, and in a dispersed state from the first biological treatment tank The first biological treatment water containing bacteria is passed through the biological treatment tank after the second biological treatment tank for biological treatment, and the treated water of the biological treatment tank after the second biological treatment tank is solid-liquid separated in the sedimentation tank, In the biological treatment apparatus for organic wastewater that returns a part of the separated sludge to the biological treatment tank after the second biological treatment tank,
A biological treatment apparatus for organic wastewater, wherein a carrier for holding micro-animals is provided in a biological treatment tank after the second biological treatment tank. - 請求項7において、前記第二生物処理槽以降の生物処理槽の槽内汚泥に対する溶解性BOD汚泥負荷が0.025~0.050kg/kg-MLSS/dであることを特徴とする有機性排水の生物処理装置。 The organic waste water according to claim 7, wherein the soluble BOD sludge load with respect to the sludge in the biological treatment tank after the second biological treatment tank is 0.025 to 0.050 kg / kg-MLSS / d. Biological treatment equipment.
- 請求項7又は8において、前記第二生物処理槽以降の生物処理槽内に設けられた担体は担体の少なくとも一部が該生物処理槽に直接または固定具を介して固定された担体であることを特徴とする有機性排水の生物処理装置。 9. The carrier provided in the biological treatment tank after the second biological treatment tank according to claim 7 or 8, wherein at least a part of the carrier is fixed to the biological treatment tank directly or via a fixture. Organic wastewater biological treatment equipment.
- 請求項7ないし9のいずれか1項において、前記有機性排水の一部を前記第一生物処理槽を経ることなく前記第二生物処理槽以降の生物処理槽に導入する手段を有することを特徴とする有機性排水の生物処理装置。 In any 1 item | term of the Claims 7 thru | or 9, It has a means to introduce | transduce a part of said organic waste water into the biological treatment tank after the said 2nd biological treatment tank, without passing through the said 1st biological treatment tank. Biological treatment equipment for organic wastewater.
- 請求項7ないし10のいずれか1項において、前記第二生物処理槽以降の生物処理槽のSRT(固形分滞留時間)が50日以下であることを特徴とする有機性排水の生物処理装置。 The biological treatment apparatus for organic wastewater according to any one of claims 7 to 10, wherein an SRT (solid content retention time) of the biological treatment tank after the second biological treatment tank is 50 days or less.
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KR20137024131A KR20140009347A (en) | 2011-03-16 | 2012-03-13 | Device and method for biological treatment of organic wastewater |
JP2013504731A JP5915643B2 (en) | 2011-03-16 | 2012-03-13 | Biological treatment method and apparatus for organic wastewater |
SG2013067079A SG193336A1 (en) | 2011-03-16 | 2012-03-13 | Device and method for biological treatment of organic wastewater |
CN201280013562.9A CN103429540B (en) | 2011-03-16 | 2012-03-13 | The bioremediation of organic drainage and device |
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JP (1) | JP5915643B2 (en) |
KR (1) | KR20140009347A (en) |
CN (1) | CN103429540B (en) |
MY (1) | MY165049A (en) |
SG (1) | SG193336A1 (en) |
TW (1) | TWI465402B (en) |
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Cited By (4)
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WO2016002826A1 (en) * | 2014-07-01 | 2016-01-07 | 栗田工業株式会社 | Biological treatment method and biological treatment device for organic waste water |
JP2016150332A (en) * | 2015-02-19 | 2016-08-22 | 栗田工業株式会社 | Method and apparatus for biologically treating organic waste water |
KR20160003373U (en) | 2015-03-23 | 2016-10-04 | 쿠리타 고교 가부시키가이샤 | Carrier for biological treatment and biological treatment tank |
WO2020080460A1 (en) * | 2018-10-17 | 2020-04-23 | 荏原実業株式会社 | Apparatus and method for biological treatment of organic waste water |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019048254A (en) * | 2017-09-08 | 2019-03-28 | オルガノ株式会社 | Method and device for treating organic wastewater |
JP2022122572A (en) * | 2021-02-10 | 2022-08-23 | オルガノ株式会社 | Water treatment method and water treatment apparatus |
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- 2012-03-13 JP JP2013504731A patent/JP5915643B2/en active Active
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Also Published As
Publication number | Publication date |
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SG193336A1 (en) | 2013-10-30 |
MY165049A (en) | 2018-02-28 |
CN103429540B (en) | 2016-03-30 |
JP5915643B2 (en) | 2016-05-11 |
CN103429540A (en) | 2013-12-04 |
JPWO2012124675A1 (en) | 2014-07-24 |
KR20140009347A (en) | 2014-01-22 |
TWI465402B (en) | 2014-12-21 |
TW201302626A (en) | 2013-01-16 |
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