WO2009090725A1 - 槽外設置型膜分離活性汚泥法 - Google Patents
槽外設置型膜分離活性汚泥法 Download PDFInfo
- Publication number
- WO2009090725A1 WO2009090725A1 PCT/JP2008/050338 JP2008050338W WO2009090725A1 WO 2009090725 A1 WO2009090725 A1 WO 2009090725A1 JP 2008050338 W JP2008050338 W JP 2008050338W WO 2009090725 A1 WO2009090725 A1 WO 2009090725A1
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- WO
- WIPO (PCT)
- Prior art keywords
- membrane
- tank
- separation
- biological reaction
- activated sludge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/04—Backflushing
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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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
- C02F2303/16—Regeneration of sorbents, filters
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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 an outside tank type membrane separation activated sludge method used for treating various organic wastewater such as sewage, return water, industrial wastewater, waste leachate, human waste, agricultural wastewater, livestock wastewater and aquaculture wastewater.
- the present invention relates to the handling of backwash wastewater generated when backwashing a separation membrane installed outside the tank.
- an activated sludge method is generally used in which organic matter is decomposed by microorganisms in a biological treatment tank.
- the water in the biological treatment tank is sent to the final sedimentation basin and subjected to solid-liquid separation by gravity sedimentation, and the supernatant water is taken out as treated water.
- membrane separation activated sludge method membrane bioreactor process
- This membrane separation activated sludge method has a membrane installed activated sludge method in which the separation membrane is immersed in the tank and the water in the tank is directly filtered. It is roughly classified into an outside tank type membrane separation activated sludge method in which filtration is performed while circulating the gas through the separation membrane.
- the separation membrane is immersed in the biological tank, so the particles (membrane surface clogging material) with a size close to the membrane pore size captured on the membrane surface are removed from the biological reaction tank. Cannot be removed from the tank. For this reason, there existed a problem that it was difficult to ensure the stability of membrane filtration performance.
- the membrane separation activated sludge method installed outside the tank can be removed from the membrane surface by backwashing when the membrane surface clogging material has accumulated on the separation membrane. It was common to return to the biological reactor through a circulation path and reprocess it.
- the membrane surface blocking substance in the backwash drainage may be in the form of pellets, but when it is returned to the biological reaction tank, it is disassembled by aeration and agitation and returns to the original particles.
- the object of the present invention is to solve the above-mentioned conventional problems, without excessively reducing the MLSS concentration in the biological reaction tank, and without requiring another wastewater treatment facility for backwash wastewater.
- the object is to provide an outside tank type membrane separation activated sludge method capable of ensuring the stability of the membrane filtration performance of the separation membrane.
- the present invention made in order to solve the above-mentioned problem is a separation membrane in an outside tank type membrane separation activated sludge method in which the in-vessel water of a biological reaction tank is circulated through a separation membrane installed outside the tank and filtrate is taken out.
- Backwash wastewater containing membrane surface clogging material generated by backwashing is treated with ozone to make the membrane surface clogging material fine or easy to be taken into activated sludge flocs and returned to the biological reaction tank. It is characterized by this.
- the membrane surface blocking substance finer than the pore size of the separation membrane by ozone treatment.
- the ozone supply amount in the ozone treatment is preferably 20 to 100 mgO 3 / L per backwash wastewater amount.
- a ceramic monolithic membrane can be used as the separation membrane.
- the separation membrane is preferably provided with a primary-side flow path having a circular cross section or a polygonal shape.
- the backwash wastewater is treated with ozone to refine the membrane surface blocking substance, so that the membrane surface blocking material returned to the biological reaction tank becomes fine particles that do not block the membrane surface and again blocks the membrane surface.
- the membrane surface blocking substance amount in the biological reaction tank does not increase as in the conventional case, and the stability of the membrane filtration performance of the separation membrane can be ensured.
- the entire amount of backwash wastewater can be returned to the biological reaction tank, no separate wastewater treatment facility is required for backwash wastewater, and since the backwash wastewater is not discharged to the outside, the MLSS concentration in the bioreaction tank is reduced.
- the biological activity of the bioreactor can be maintained by maintaining it in the range of 5000 to 20000 mg / L without excessive reduction.
- the wastewater treated with ozone is returned to the anaerobic tank for biological dephosphorization.
- a treatment process that includes biological dephosphorization such as anaerobic anaerobic anaerobic method
- the wastewater treated with ozone is returned to the anaerobic tank for biological dephosphorization.
- Necessary organic substances can be supplied, and biological dephosphorization can be stabilized.
- reference numeral 1 denotes a biological reaction tank, in which raw water which is organic wastewater, for example, sewage, is treated with activated sludge by an aerobic microorganism as in the prior art.
- Reference numeral 2 denotes a separation membrane installed outside the biological reaction tank 1. Water in the tank of the biological reaction tank 1 is continuously supplied to the primary side by the circulation pump 3 and subjected to membrane filtration. In this embodiment, cross-flow filtration is performed, and the membrane filtrate that has permeated the membrane surface to the secondary side is taken out as treated water to the treated water tank 4, and the concentrated water is returned from the end on the primary side. It returns to the biological reaction tank 1 through the pipe line 5.
- the type of the separation membrane 2 is an MF membrane or a UF membrane, and the material thereof may be ceramic or polymer.
- the membrane shape may be any of a monolith membrane, a tubular membrane, a flat membrane, and a hollow fiber membrane, and the pressurization method may be either an internal pressure type or an external pressure type.
- the flow path on the primary side has a circular cross section or a polygon that is a quadrangle or more.
- a ceramic monolith membrane manufactured by NGK Corporation is used as the separation membrane 2.
- This membrane is an MF membrane in which a large number of channels having a circular cross section are formed inside the ceramic porous body, and the peripheral surface of each channel is a membrane surface having a membrane pore diameter of 0.1 ⁇ m.
- the solid-liquid separation of the water in the biological reaction tank 1 can be easily performed, and the entire apparatus can be downsized as compared with the conventional final sedimentation tank. be able to.
- the circulation pump 3 is stopped periodically or when the membrane differential pressure rises, and the treated water is discharged from the treated water tank 4.
- the backwash pump 6 drives the secondary side of the separation membrane 2 to backwash the membrane surface.
- the frequency of backwashing varies greatly depending on the properties of the raw water, but is preferably about once every 10 minutes when the raw water is highly contaminated, and about once every 3 hours when the raw water is dirty.
- the backwash drainage generated by this backwash is discharged to the backwash drainage tank 7.
- This backwash drainage contains activated sludge and membrane surface blocking substances that have been separated from the membrane surface.
- the backwash wastewater is returned to the biological reaction tank 1 as it is, but in the present invention, ozone is supplied from the ozone supply device 8 into the backwash wastewater to perform ozone treatment.
- Ozone is a gas with strong oxidizing power and has the effect of destroying and decomposing organic matter.
- the membrane surface blocking substance in the backwash waste water can be refined to make fine particles smaller than the membrane pore diameter of the separation membrane 2.
- the supply amount of ozone is preferably about 20 to 100 mg O 3 / L per backwash waste water amount. If the supply amount of ozone is less than this range, the action of destroying and decomposing organic substances is insufficient, and the effects of the present invention cannot be obtained sufficiently.
- ozone treatment means may be provided separately.
- the backwash waste water treated with ozone is returned to the biological reaction tank 1 by a return pump 9.
- the membrane surface blocking substance in the vicinity of the membrane pore diameter by ozone treatment becomes fine particles smaller than the membrane pore diameter or becomes a substance that is easily taken into the activated sludge floc by surface modification.
- the amount of the membrane surface blocking substance composed of particles in the vicinity of the membrane pore diameter does not increase. Therefore, according to the present invention, the membrane filtration performance of the separation membrane 2 is not rapidly reduced, and stable filtration is possible over a long period of time.
- the backwash waste water is returned to the biological reaction tank 1 without being discharged out of the system, so that the MLSS concentration in the biological reaction tank 1 does not decrease and the biological activity of the biological reaction tank 1 is stably maintained. can do.
- the MLSS of the water in the biological reaction tank can be maintained at 5000 to 20000 mg / L.
- the backwash wastewater is returned to the biological reaction tank 1 without being discharged out of the system, it is not necessary to provide another processing device for treating the backwash wastewater. Examples of the present invention are shown below.
- the activated sludge treatment of the sewage was performed using the treatment apparatus shown in FIG.
- the MLSS concentration in the biological reaction tank was 10,000 mg / L.
- the separation membrane is a monolithic ceramic membrane manufactured by the applicant company, and the membrane pore diameter is 0.1 ⁇ m.
- Cross flow filtration was performed by circulating water in the biological reaction tank, and membrane filtrate was taken out as treated water.
- the separation membrane was back-washed by stopping the filtration operation every hour.
- Backwash drainage containing membrane surface blocking substances was collected in a backwash drainage tank, and ozone treatment was performed by blowing ozone.
- the ozone supply amount is 100 mg O 3 / L per backwash waste water amount.
- the entire amount of ozone-washed backwash wastewater was returned to the biological reaction tank.
- the properties of the treated water are the same, but in the conventional example, the membrane filtration flux of the separation membrane is 2. While it was 0 m / day, it was 2.4 m / day in the examples, and it was confirmed that the membrane filtration performance was greatly improved by the ozone treatment. In addition, the MLSS concentration in the bioreactor remained at 10000 mg / L and did not decrease.
- the ozone supply amount to the backwash waste water was reduced to 1/5 of Example 1, and the influence of the separation membrane on the membrane filtration flux was examined.
- the ozone supply amount is 20 mg O 3 / L per backwash waste water amount.
- the entire amount of ozone-washed backwash wastewater was returned to the biological reactor.
- the membrane filtration flux of the separation membrane was 2.0 m / day, whereas in the example, it was 2.4 m / day, confirming that the membrane filtration performance was greatly improved by ozone treatment. It was. As described above, it was confirmed that the membrane filtration performance could be improved even with a small amount of ozone.
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Activated Sludge Processes (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
Description
本発明においては、分離膜としてセラミック製モノリス膜を用いることができ、その場合には、分離膜が断面円形または多角形の一次側流路を備えたものであることが好ましい。
本発明においては、逆洗排水をオゾン処理したうえで生物反応槽に返送することにより、生物反応槽の槽内水のMLSSを5000~20000mg/Lに維持することが好ましく、逆洗頻度は、10分から3時間に1回程度とすることが好ましい。
2 分離膜
3 循環ポンプ
4 処理水タンク
5 返流管路
6 逆洗ポンプ
7 逆洗排水タンク
8 オゾン供給装置
図1において1は生物反応槽であり、従来と同様に有機性排水である原水、例えば下水が好気性微生物によって活性汚泥処理されている。2は生物反応槽1の外部に設置された分離膜であり、その一次側に生物反応槽1の槽内水が循環ポンプ3によって連続的に供給され、膜ろ過される。この実施形態ではクロスフロー方式のろ過が行われており、膜面を二次側に透過した膜ろ過水は処理水として処理水タンク4に取り出され、濃縮水は一次側の端部から返流管路5を通じて生物反応槽1に返送される。
Claims (7)
- 生物反応槽の槽内水を槽外に設置した分離膜に循環させてろ過水を取り出す槽外設置型膜分離活性汚泥法において、分離膜を逆洗することによって生じた膜面閉塞物質を含む逆洗排水をオゾン処理したうえで生物反応槽に返送することを特徴とする槽外設置型膜分離活性汚泥法。
- オゾン処理により、膜面閉塞物質を分離膜の膜孔径よりも微細化することを特徴とする請求項1記載の槽外設置型膜分離活性汚泥法。
- オゾン処理におけるオゾン供給量を、逆洗排水量あたり20~100mgO3/Lとすることを特徴とする請求項1記載の槽外設置型膜分離活性汚泥法。
- 分離膜が、セラミック製モノリス膜であることを特徴とする請求項1記載の槽外設置型膜分離活性汚泥法。
- 分離膜が、断面円形または多角形の一次側流路を備えたものであることを特徴とする請求項4記載の槽外設置型膜分離活性汚泥法。
- 逆洗排水をオゾン処理したうえで生物反応槽に返送することにより、生物反応槽の槽内水のMLSSを5000~20000mg/Lに維持することを特徴とする請求項1記載の槽外設置型膜分離活性汚泥法。
- 逆洗頻度を、10分から3時間に1回としたことを特徴とする請求項1記載の槽外設置型膜分離活性汚泥法。
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP08703202.5A EP2230210B1 (en) | 2008-01-15 | 2008-01-15 | Membrane-separation active sludge system to be located outside tank |
| KR1020107014901A KR20100102634A (ko) | 2008-01-15 | 2008-01-15 | 조 외부 설치형 막분리 활성 오니법 |
| PCT/JP2008/050338 WO2009090725A1 (ja) | 2008-01-15 | 2008-01-15 | 槽外設置型膜分離活性汚泥法 |
| JP2009549916A JP5208136B2 (ja) | 2008-01-15 | 2008-01-15 | 槽外設置型膜分離活性汚泥法 |
| CN2008801246251A CN101918325B (zh) | 2008-01-15 | 2008-01-15 | 槽外设置型膜分离活性污泥法 |
| AU2008347921A AU2008347921B2 (en) | 2008-01-15 | 2008-01-15 | Side stream type membrane bioreactor process |
| US12/817,492 US7875179B2 (en) | 2008-01-15 | 2010-06-17 | Side stream type membrane bioreactor process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2008/050338 WO2009090725A1 (ja) | 2008-01-15 | 2008-01-15 | 槽外設置型膜分離活性汚泥法 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US12/817,492 Continuation US7875179B2 (en) | 2008-01-15 | 2010-06-17 | Side stream type membrane bioreactor process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2009090725A1 true WO2009090725A1 (ja) | 2009-07-23 |
Family
ID=40885136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2008/050338 Ceased WO2009090725A1 (ja) | 2008-01-15 | 2008-01-15 | 槽外設置型膜分離活性汚泥法 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US7875179B2 (ja) |
| EP (1) | EP2230210B1 (ja) |
| JP (1) | JP5208136B2 (ja) |
| KR (1) | KR20100102634A (ja) |
| CN (1) | CN101918325B (ja) |
| AU (1) | AU2008347921B2 (ja) |
| WO (1) | WO2009090725A1 (ja) |
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|---|---|---|---|---|
| CN101830610A (zh) * | 2010-05-31 | 2010-09-15 | 浙江汉蓝环境科技有限公司 | 一种利用微生物处理垃圾渗滤液的方法 |
| CN103011505A (zh) * | 2012-12-11 | 2013-04-03 | 南昌大学 | 光催化内循环一体式mbr反应器 |
| JP7677675B1 (ja) * | 2024-05-24 | 2025-05-15 | Wota株式会社 | 水処理システム、水処理方法及び水処理モジュール |
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| KR100407528B1 (ko) | 2000-09-18 | 2003-11-28 | 아사히 가세이 가부시키가이샤 | 산화 또는 가암모니아산화용 산화물 촉매의 제조 방법 |
| TWI585049B (zh) * | 2011-03-30 | 2017-06-01 | Kurita Water Ind Ltd | Organic drainage of the treatment device |
| CA2856196C (en) | 2011-12-06 | 2020-09-01 | Masco Corporation Of Indiana | Ozone distribution in a faucet |
| CN102616999A (zh) * | 2012-04-11 | 2012-08-01 | 江苏韦帕环境工程有限公司 | 污水净化回用装置 |
| US9540270B2 (en) * | 2012-04-20 | 2017-01-10 | Anaergia Inc. | Anaerobic treatment of industrial wastewater |
| CN106103361A (zh) * | 2014-04-29 | 2016-11-09 | 三菱电机株式会社 | 污泥处理装置和污泥处理方法 |
| CN107922221A (zh) * | 2015-08-27 | 2018-04-17 | 三菱电机株式会社 | 水处理方法及水处理装置 |
| WO2017112795A1 (en) | 2015-12-21 | 2017-06-29 | Delta Faucet Company | Fluid delivery system including a disinfectant device |
| CN106673381A (zh) * | 2016-11-03 | 2017-05-17 | 深圳市康源环境纳米科技有限公司 | 一种污泥处理装置及方法 |
| CN108314273B (zh) * | 2018-04-18 | 2024-07-12 | 北京吉工科技有限公司 | 一种污水处理设备及污水处理方法 |
| US11524263B1 (en) | 2019-08-15 | 2022-12-13 | Wigen Companies, Inc. | Filtration processes and systems |
| CN110713255A (zh) * | 2019-11-20 | 2020-01-21 | 中科院建筑设计研究院有限公司 | 一种降低厌氧膜生物反应器板式陶瓷膜污染的装置与方法 |
| CN111675447A (zh) * | 2020-07-17 | 2020-09-18 | 苏州中环建科环境科技有限公司 | 一种中小型餐厨垃圾处理站垃圾渗透滤液的处理工艺 |
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2008
- 2008-01-15 WO PCT/JP2008/050338 patent/WO2009090725A1/ja not_active Ceased
- 2008-01-15 CN CN2008801246251A patent/CN101918325B/zh active Active
- 2008-01-15 JP JP2009549916A patent/JP5208136B2/ja active Active
- 2008-01-15 EP EP08703202.5A patent/EP2230210B1/en active Active
- 2008-01-15 KR KR1020107014901A patent/KR20100102634A/ko not_active Ceased
- 2008-01-15 AU AU2008347921A patent/AU2008347921B2/en active Active
-
2010
- 2010-06-17 US US12/817,492 patent/US7875179B2/en active Active
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| CN101830610A (zh) * | 2010-05-31 | 2010-09-15 | 浙江汉蓝环境科技有限公司 | 一种利用微生物处理垃圾渗滤液的方法 |
| CN101830610B (zh) * | 2010-05-31 | 2011-08-24 | 浙江汉蓝环境科技有限公司 | 一种利用微生物处理垃圾渗滤液的方法 |
| CN103011505A (zh) * | 2012-12-11 | 2013-04-03 | 南昌大学 | 光催化内循环一体式mbr反应器 |
| JP7677675B1 (ja) * | 2024-05-24 | 2025-05-15 | Wota株式会社 | 水処理システム、水処理方法及び水処理モジュール |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2008347921B2 (en) | 2012-10-11 |
| EP2230210A1 (en) | 2010-09-22 |
| CN101918325A (zh) | 2010-12-15 |
| AU2008347921A1 (en) | 2009-07-23 |
| JPWO2009090725A1 (ja) | 2011-05-26 |
| JP5208136B2 (ja) | 2013-06-12 |
| US20100264081A1 (en) | 2010-10-21 |
| KR20100102634A (ko) | 2010-09-24 |
| US7875179B2 (en) | 2011-01-25 |
| EP2230210A4 (en) | 2012-11-21 |
| CN101918325B (zh) | 2013-01-02 |
| EP2230210B1 (en) | 2016-06-15 |
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