Method for treating rural sewage with effect of removing phosphate and nitrogen

A rural sewage and denitrification technology, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of inefficient phosphorus and nitrogen removal, excessive sludge, etc., and achieve The effect of extending the backwashing cycle, increasing suspended solids, and reducing pollutant discharge

Inactive Publication Date: 2012-03-14
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can overcome the known problems that the biological aerated filter requires frequent backwashing and produces more sludge, and cannot remove phosphorus and nitrogen efficiently when used alone.

Method used

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  • Method for treating rural sewage with effect of removing phosphate and nitrogen
  • Method for treating rural sewage with effect of removing phosphate and nitrogen
  • Method for treating rural sewage with effect of removing phosphate and nitrogen

Examples

Experimental program
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Effect test

Embodiment 1

[0053] Adopt the pretreatment system of the present invention-anoxic tank-front biological contact oxidation tank-biological aerated filter tank-post biological contact oxidation tank to remove organic matter in sewage and advanced treatment of sewage, and average daily treatment of rural domestic sewage 25 tons, of which the fecal sewage contained in domestic sewage is septic tank effluent.

[0054] Rural domestic sewage enters the pretreatment system consisting of grille, primary sedimentation tank and regulating tank 1 to remove large particles of impurities and floating objects in the sewage and adjust the water quality and quantity, and then pumped into the anoxic tank by the lift pump.

[0055] The hydraulic retention time in anoxic tank 2, pre-biological contact oxidation tank 3, biological aerated filter ceramsite 4-4, and rear biological contact oxidation tank 5 are 1 hour, 2 hours, 4 hours, and 1 hour respectively , the air volume supplied by the air pump 4-5 to the ...

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Abstract

The invention discloses a method for treating rural sewage with an effect of removing phosphate and nitrogen, characterized in that: a preposed anoxic pond is used for denitrification; a preposed biological contact oxidation pond is used for prolonging the backwashing period of a biological aerated filter markedly; in the biological aerated filter, organic matters are removed from water and nitrification or partial denitrification of ammonia nitrogen is realized; and a clear liquid is added in a post biological contact oxidation pond for raising the standards of water treatment. The invention is suitable for rural dispersed pollution discharge points, especially water protection areas having strict requirements on rural sewage discharge, and locations requiring advanced treatment and sewage resource recycling.

Description

Technical field: [0001] The invention belongs to the technical field of rural domestic sewage treatment and relates to a method for advanced treatment of rural domestic sewage by using an aerated biological filter combined with biological contact oxidation. Background technique: [0002] Most of the traditional modes of constructing centralized sewage plants and sewage treatment technologies are designed for urban municipal or construction sewage, which generally have the characteristics of small operation flexibility, large sludge discharge, complex process and difficult maintenance and management techniques. The treatment of rural sewage and sustainable development have many limitations. With the deepening of new rural construction and the improvement of people's living standards, on the one hand, the consumption of water resources has doubled, and on the other hand, the sewage has increased significantly, making the impact of rural sewage on the water environment increasi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/30
Inventor 杨建州王斌科白志辉庄国强
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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