Treatment method for home wastewater

Abstract

The present invention relates to a domestic sewage treatment method. Said method includes the following steps: firstly, respectively cultivating active sludge in the anaerobic pool and aerobic pool of sewage treatment system; feeding the domestic sewage into anaerobic pool to implement anaerobic phosphorus-releasing reaction, then feeding the domestic sewage into aerobic pool to implement aerobic phosphorus-absorbing reaction, then feeding the domestic sewage into precipitation pool to make precipitation to separate sludge from water, making the precipitated sludge back-return into anaerobic pool and making the residual sludge discharge from system, feeding the precipitated water into aerobic biological filtering pool to implement nitration reaction to make the discharged water meet discharge standard.

Description

technical field [0001] The invention relates to a treatment method for domestic sewage, which belongs to the technical field of environmental protection. Background technique [0002] In the prior art, the method for denitrification and phosphorus removal of domestic sewage is mostly anaerobic-anoxic-aerobic method (hereinafter referred to as A 2 / O method). Its main process is as figure 1 As shown, the influent 1K first enters the anaerobic tank 1A, then enters the anoxic tank 1B, and then flows into the aerobic tank (with nitrification reaction) 1C, and after sedimentation in the sedimentation tank 1D, the sludge is separated from the sewage, and the effluent is 1J. If the phosphorus content in the effluent is to meet the national first-level standard, it is necessary to add a filter pool 1E. [0003] Nitrogen removal function: From the aerobic pool 1C to the anoxic pool 1B, there is a mixed liquid backflow 1F, which is about 1 to 3 times that of the incoming water. In...

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Problems solved by technology

[0012] The purpose of the present invention is to propose a treatment method for denitrification and dephosphorization of sewage, to solve the contradictions in the existing treatment methods, to better reach the first-level standard in the "National Comprehensive Sewage Discharge Standard", and to reduce the scale of civil engineering, Improve the effect of nitrogen and phosphorus removal, reduce the water quality requirements of influent, reduce the energy consumption of treatment, and effectively enhance the stability of the system

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