Double-membrane double-circulation sewage treatment process for enhancing denitrifying phosphorus removal

A technology for denitrification phosphorus removal and sewage treatment, which is applied in biological water/sewage treatment, water/sludge/sewage treatment, aerobic and anaerobic process treatment, etc., and can solve the problem of denitrification phosphorus removal efficiency and stability Improvement, complex process, inconvenient operation, etc., to achieve the effect of strengthening denitrification phosphorus removal efficiency, ensuring nitrification effect, and reducing operating time

CN103755025AInactive Publication Date: 2014-04-30CHINA UNIV OF MINING & TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2014-04-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a double-membrane double-circulation sewage treatment process for enhancing denitrifying phosphorus removal. An anaerobic / anoxia membrane bioreactor and an aerobic membrane bioreactor are connected in series so as to enhance denitrifying phosphorus removal through a double-membrane filtration two-way circulation mode. The double-membrane double-circulation sewage treatment process comprises the steps of: firstly, carrying out anaerobic phosphorus release on phosphorus-accumulating bacteria under anaerobic condition, and storing organic matters in inflowing water as poly-beta-hydroxybutyric acid; then circulating supernate subjected to anaerobic phosphorus release to the aerobic membrane bioreactor for carrying out aerobic nitrification and degrading organic matters through a membrane assembly, circulating nitrifying liquid in the aerobic membrane bioreactor to the anaerobic / anoxia membrane bioreactor for carrying out denitrifying phosphorus removal through the membrane assembly; then filtering effluent water by utilizing the membrane assembly, and finally discharging phosphorous-rich sludge, thus realizing the phosphorous removal. According to the double-membrane double-circulation sewage treatment process, the thorough separation of nitrobacterium and phosphorous-accumulating bacteria can be realized, the carbon source competence of different microorganisms and sludge age conflict in the traditional denitrification and phosphorous removal processes can be solved, and the carbon sources and running cost can be saved; the membrane filtration can meet the requirement on the quality of sewage recycled water; the process is simple in flow and convenient to operate.
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Description

technical field

[0001] The invention relates to the technical field of wastewater treatment, in particular to a double-membrane double-circulation water treatment process that strengthens the denitrification and phosphorus removal of low-carbon source urban sewage. Background technique

[0002] Eutrophication of water body has been widely concerned because of its serious environmental hazards. Eutrophication of water body will affect the normal reoxygenation level of the atmosphere, reduce the concentration of dissolved oxygen in the water body, and cause a large number of deaths of aquatic animals and fish. The artificial discharge of industrial wastewater and domestic sewage containing nutrients (nitrogen, phosphorus) is an important factor causing eutrophication of water bodies. Improving the denitrification and phosphorus removal efficiency of sewage treatment plants is one of the effective measures to prevent the occurrence of eutrophication in water bodies. In order t...

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Embodiment Construction

[0025] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0026] The double-membrane double-circulation sewage treatment process for strengthening denitrification and phosphorus removal of the present invention adopts a regulating tank 1, an anoxic / anoxic membrane bioreactor 2, an aerobic membrane bioreactor 3, and a sludge concentration pool 4, wherein the anaerobic / anoxic Membrane bioreactor 2 and good membrane bioreactor 3 are respectively equipped with membrane modules, which are used for the circulation of supernatant liquid and nitrification liquid and membrane effluent; in anaerobic / anoxic membrane bioreactor 2, the The circulating pump 8 realizes the washing of the membrane surface to slow down the membrane fouling, and the membrane surface is washed by blast aeration in the good membrane bioreactor to control the membrane fouling, and the aeration also plays the role of oxygen supply to the microorganisms....