Membrane bioreactor process for removing phosphorus without mud discharge

A membrane bioreactor and process technology, applied in aerobic process treatment, sustainable biological treatment, biological water/sewage treatment, etc., can solve the problems of large land occupation and difficult sludge disposal, and avoid traditional process routes Effect

Active Publication Date: 2010-11-17
JIANGXI JDL ENVIRONMENTAL PROTECTION CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a new membrane bioreactor process without sludge removal and phosphorus removal, which overcomes the difficulty and large area of ​​sludge disposal in existing conventional biochemical treatment processes and membrane bioreactor processes through sludge removal and phosphorus removal Defects

Method used

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Embodiment Construction

[0008] The present invention is realized through the following process steps: by centrally distributing the aeration rate under the membrane area, an aerobic area with dissolved oxygen greater than 2 mg / L is locally formed in the membrane area, providing biochemical reaction conditions for microorganisms to absorb phosphorus aerobically; other The dissolved oxygen in the area is less than 1mg / L, and through the formation of a circular flow field form, an aerobic-facultative-anaerobic alternate distribution flow field form is formed to realize the biochemical reaction environment of aerobic phosphorus absorption and anaerobic phosphorus release; sewage from the membrane The area rises to the upper part of the membrane area through the circulation flow field form. Since the dissolved oxygen is rapidly utilized by microorganisms in the middle and lower parts of the membrane area, a facultative oxygen area is basically formed in the upper part of the membrane area and outside the me...

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Abstract

The invention provides a membrane bioreactor process for removing phosphorus without mud discharge. In the process, arrangement of an aeration system is optimized, the aeration intensity is concentrated under a membrane assembly to form an aerobic zone in a local membrane area so as to provide biochemical reaction condition for aerobic phosphorus uptake of microorganisms; sewage rises to the upper part of the membrane area from the membrane area through a circular flow field state; because dissolved oxygen is quickly utilized by the microorganisms in the middle lower part of the membrane area, a facultative an aeration area is basically formed on the upper part of the membrane area and outside the membrane assembly, and the microorganisms release phosphorus in the facultative an aeration area; enrichment and growth of phosphate reducing bacteria in the system can be realized by the trapping effect of a microfiltration membrane so as to provide conditions for gasification removal of phosphorus; and a novel phosphorus removal method can be realized by constructing the biochemical reaction environment suitable for gasification removal of phosphorus so as to avoid the traditional process route of mud discharge phosphorus removal.

Description

technical field [0001] The invention relates to a membrane bioreactor process, in particular to a membrane bioreactor process capable of removing phosphorus without sludge discharge. Background technique [0002] At present, the typical phosphorus removal process includes a combination of facultative and aerobic biochemical treatment processes. The phosphorus-accumulating microorganisms in activated sludge absorb excessive phosphorus in sewage under aerobic conditions, and return the sludge to anaerobic or facultative processes. The absorbed phosphorus is released under certain conditions. Its mechanism is the application of microbial aerobic phosphorus uptake, and the removal of phosphorus from the sewage treatment system is achieved by discharging part of the sludge. Therefore, sludge removal and phosphorus removal have become the main technology for phosphorus removal in sewage treatment at present. This method mainly has the following problems in practical engineering a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
CPCC02F3/20C02F3/301C02F3/308C02F2209/08C02F3/34C02F2209/22C02F2303/06C02F3/1273Y02W10/10
Inventor 廖志民熊建中杨圣云周佳琳何凌云万爱国居德金袁志华曹解军陶琨
Owner JIANGXI JDL ENVIRONMENTAL PROTECTION CO LTD
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