High efficiency nitrification process of biological sewage treatment

A sewage biological treatment and process technology, applied in the field of sewage biological treatment nitrification process, can solve the problems of low denitrification efficiency, high cost, long reaction time, etc., and achieve the effects of simple process, prevention of sludge bulking, and low capital investment

Inactive Publication Date: 2008-08-20
CHINA UNIV OF MINING & TECH
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Problems solved by technology

However, in order to achieve a good denitrification effect in the existing denitrification process, sufficient aeration time must be ensured to meet the growth of a large number of nitrifying bacteria and achieve the purpose of nitrification, so the entire reaction time is relatively long, generally 8 hours around, so the denitrification efficiency is low and the cost is high

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  • High efficiency nitrification process of biological sewage treatment

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Embodiment Construction

[0012] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0013] The present invention is a sewage biological treatment nitrification process, the main structure is a non-aeration pool and an aerobic pool composed of anoxic pool and anaerobic pool, and the anoxic pool and anaerobic pool in the non-aerated pool can be built together or can be Separate construction, non-aerated pool and aerobic pool can be built together or separately. Divert the sewage into the non-aerated tank and the aerobic tank at the same time. The aerobic tank is divided into four water inlet points, and there is a water inlet point between the aerobic tank and the secondary sedimentation tank. The sewage entering the non-aerated tank undergoes anoxic and anaerobic effects, then enters the aerobic tank, mixes with the sewage directly entering the aerobic tank for aeration, and then the mixed solution enters the secondary sedimentation tank fo...

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Abstract

The present invention is high efficiency nitrification process of biological sewage treatment, especially suitable for city sewage treatment. The sewage treating process includes shunting sewage in certain ratio, treating partial sewage in no-aeration tank comprising anoxic tank and anaerobic tank, making partial sewage enter to the aerobic tank directly, mixing the sewage from the no-aeration tank and the directly entering sewage and aerating in the aerobic tank, and final solid-liquid separation in the secondary settling tank. Compared with available technology, the present invention has the features of short treating period, high efficiency, simple technological process, high denitrification effect, etc.

Description

technical field [0001] The invention relates to a sewage biological treatment nitrification process, which is especially suitable for nitrogen and phosphorus removal treatment of sewage. Background technique [0002] The problem of water pollution caused by nitrogen pollution in my country is relatively serious, and lake "blooms" and offshore "red tides" occur from time to time. Eutrophication of water body has endangered agriculture, fishery, tourism and many other industries; it also poses a threat to drinking water sanitation and food safety. At present, to control nitrogen pollution, common engineering technologies at home and abroad include air stripping method, selective ion exchange method, breakpoint chlorination method, biological denitrification method, etc. Among them, biological denitrification is the most economical and effective treatment technology. In recent years, many countries have strengthened the research on biological denitrification, and have made gre...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30
Inventor 张雁秋
Owner CHINA UNIV OF MINING & TECH
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