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Intensified anti-nitrated phosphorous-removal sequencing batch membrane bioreactor technique

A sequencing batch membrane bioreactor and membrane bioreactor technology, applied in the field of environmental engineering, can solve the problems of insufficient denitrification and phosphorus removal capacity of membrane bioreactors and inability to meet water quality requirements, so as to achieve safe and reliable water quality and reduce oxygen consumption and sludge production, and the effect of meeting the water quality requirements for reclaimed water

Inactive Publication Date: 2007-10-31
DALIAN UNIV OF TECH
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Problems solved by technology

[0005] Studies at home and abroad have proved that the membrane bioreactor process that combines membrane filtration and biodegradation is an efficient and practical technology for sewage treatment and reclaimed water reuse, but the membrane bioreactor has insufficient nitrogen and phosphorus removal capabilities to meet Increasingly stringent water quality requirements

Method used

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  • Intensified anti-nitrated phosphorous-removal sequencing batch membrane bioreactor technique
  • Intensified anti-nitrated phosphorous-removal sequencing batch membrane bioreactor technique
  • Intensified anti-nitrated phosphorous-removal sequencing batch membrane bioreactor technique

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Embodiment

[0020] This process is suitable for treating low-carbon and high-ammonia nitrogen with a C / N ratio of about 6:1, and the TP is 9-15 mg / L domestic sewage. At this time, the cycle of the time relay is set to 3 hours. If the C / N ratio is lower than 6:1, extend the cycle period or increase the reflux ratio.

[0021] The mixer 11 is normally on. The lifting pump 10, the suction pump 9 and the blower 3 start synchronously. At this stage, the anaerobic / anoxic pool 2 enters the water, and the water level of the reaction pool 2 is restored to the highest water level in the shortest possible time. This is the anaerobic stage; Water comes out of the bioreactor 6, and the water level of the membrane bioreactor 6 drops. After 2 hours, controlled by the time relay, the suction pump 9 and the blower 3 stop running. At the same time, the sludge diversion pump 8 and the sludge return pump 7 start synchronously. In the shortest possible time, the sludge diversion pump 8 Transfer the anaerobic...

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Abstract

The invention discloses a sequence batch type film bioreactor craft to reinforce denitrifying dephosphorize in sewage disposal and middle water reclaimed technical domain of environmental engineering, which comprises the following steps: cascading anaerobic or anoxybiotic reactor and sequence batch type film bioreactor; using inflow COD to complete the storage of PHB and relive phosphorous; polymerizing phosphoric bacterium under the anaerobic condition of the anaerobic or anoxybiotic reactor; proceeding aerobic nitrated and degraded organic material; yielding water at the same time; mixing the polyphosphoric sludge enriched with PHB and the nitrated liquid enriched with nitrate in the two reactor through sludge diversion and nitrated liquid backflow; removing nitrogen; polymerizing the phosphoric bacterium; choosing nitrate as electron acceptor; excess-absorbing phosphor; realizing synchronous denitrification dephosphorize without adding carbon source and nitrate. This invention possesses simple flow process and convenient management, which can be fit for disposing urban sewage with low carbon and high nitrogen phosphor.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and relates to sewage treatment and reclaimed water reuse technology, in particular to a method for realizing synchronous denitrification and dephosphorization functions of low-COD, high-ammonia nitrogen and phosphorus-containing wastewater by a membrane bioreactor process. Background technique [0002] my country is one of the 13 water-poor countries in the world. In order to save precious water resources, reuse of reclaimed water is one of the effective ways. Recycled sewage with high nitrogen and phosphorus content will cause the following main hazards when it is reused in industrial cooling water, industrial production water or municipal miscellaneous water: eutrophication of the receiving water body; lead to the propagation of biofouling in water pipelines and water equipment, resulting in blockage Or affect the efficiency; increase the amount of disinfectant, while increas...

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Application Information

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IPC IPC(8): C02F3/02C02F3/10C02F3/28C02F3/30
CPCY02W10/10
Inventor 张捍民杨凤林张杰肖景霓
Owner DALIAN UNIV OF TECH
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