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Biochemical reaction tank and denitrification and dephosphorization process thereof

A biochemical reaction, nitrogen and phosphorus removal technology, applied in aerobic and anaerobic process treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc., can solve the problem of large land occupation and unstable denitrification and phosphorus removal effect and other issues, to achieve the effects of energy saving, high sewage treatment efficiency, and good denitrification effect

Inactive Publication Date: 2010-04-07
SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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Problems solved by technology

[0010] An object of the present invention is to provide a biochemical reaction tank with low construction cost, low energy consumption in operation, and good effluent quality, so as to solve the problems that the current sewage treatment plant occupies a large area and the effect of nitrogen and phosphorus removal is unstable, and can Provide technical support for the realization of energy saving and emission reduction goals in the field of sewage treatment

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  • Biochemical reaction tank and denitrification and dephosphorization process thereof
  • Biochemical reaction tank and denitrification and dephosphorization process thereof

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with accompanying drawings and examples.

[0017] As shown in the figure, a biochemical reaction tank is characterized in that the biochemical reaction tank consists of anaerobic zone 1, first anoxic zone 2, first aerobic zone 3, second anoxic zone 4, and second aerobic zone 5 , the third anoxic zone 6, and the third aerobic zone 7 are formed in series in series. The input terminal of the anaerobic zone 1 is connected to the influent, and the output terminal of the third aerobic zone 7 is connected to the sedimentation tank 8, and the sedimentation The sludge from the pool 8 flows back to the first anoxic zone 2 , and the end of the first anoxic zone 2 flows back to the anaerobic zone 1 . The output end of the anaerobic zone 1 is divided into the first anoxic zone 2 , the second anoxic zone 4 and the third anoxic zone 6 .

[0018] Utilizing the denitrification and phosphorus removal process of the bio...

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Abstract

The invention belongs to the technical field of environmental protection, and particularly relates to an efficient denitrification and dephosphorization process. The denitrification and dephosphorization process is provided with 7 biochemical treatment units including an anaerobic zone, a first anoxic zone, a first aerobic zone, a second anoxic zone, a second aerobic zone, a third anoxic zone and a third aerobic zone and the like, wherein sewage is mixed with sludge by the anaerobic zone, the mixture of the sewage and the sludge flows into the three anoxic zones in proportion, the sludge in a sedimentation tank flows back to the first anoxic zone, and a mixed solution at the tail end of the first anoxic zone flows back to the anaerobic zone. The denitrification and dephosphorization process can effectively remove the pollutants of organic pollutants, suspended solids, nitrogen, phosphorus and the like with low energy consumption in a short reaction residence time and ensure that the emission requirements are reached.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a biochemical reaction pool and a nitrogen and phosphorus removal process thereof. Background technique [0002] There are many processes for denitrification and phosphorus removal of sewage in my country, mainly three series of processes including AAO, oxidation ditch and SBR. Among them, the AAO series process has become the first choice for the construction of large-scale sewage treatment plants due to its simple structure, stable water output, and convenient control. . [0003] AAO series processes are widely used in various forms, such as AAO, inverted AAO, improved AAO, Bardenpho, Joburg process, UCT, MUCT, Step-feed process, etc. [0004] (1) AAO [0005] AAO is the traditional configuration of the AAO series of processes, and is the starting point and basis of many improved processes. The process is mainly composed of anaerobic tanks, anoxic ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/30
Inventor 王国华沈昌明谭学军邹伟国
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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