Device and method for treating urban sewage by reverse air flow continuous water inlet three-circulation reactor

Abstract

The invention relates to a device and a method for treating urban sewage by a reverse air flow continuous water inlet three-circulation reactor. The device comprises an urban domestic sewage tank, a reverse air flow continuous water inlet three-circulation aeration tank and a vertical flow type precipitation tank in sequential arrangement, wherein a top water outlet of the domestic sewage tank communicates with a water inlet formed in the top of one side of the reverse air flow continuous water inlet three-circulation aeration tank through a water pipe; a water feed pump is arranged on the water pipe; a water outlet formed in the bottom of the other side of the reverse air flow continuous water inlet three-circulation aeration tank communicates with a water inlet formed in the top of the vertical flow type precipitation tank; one row of aeration pipes is arranged at one side of the inner bottom of the reverse air flow continuous water inlet three-circulation aeration tank. The reactor provided by the invention has the advantages that the organic matter and nitrogen mass transfer speed in the sewage is accelerated; the carbon source can be continuously supplemented so as to ensure the normal proceeding of denitrification. Compared with that of a conventional aeration tank, the denitrification rate is improved by about 30 percent.

Description

technical field [0001] The invention belongs to the technical field of sewage biological treatment, and in particular relates to a device for treating urban sewage with a three-circulation reactor for continuous water inflow against air flow, and also relates to a method for treating urban sewage with a three-cycle reactor for continuous water inflow against air flow. Background technique [0002] Domestic and foreign urban sewage treatment mainly adopts the activated sludge method. In view of the high nitrogen and phosphorus content in sewage, most sewage treatment plants use A 2 The core of the / O process is anaerobic reaction pool, anoxic reaction pool and aerobic reaction pool, which occupy a large area. Among them, the anaerobic reaction tank and the anoxic reaction tank both need agitator to mix mud and water to better remove nitrogen and phosphorus; the aerobic reaction tank needs a large amount of aeration to allow aerobic microorganisms to degrade organic matter in ...

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Problems solved by technology

[0005] In order to achieve the above object, the present invention provides a device for treating urban sewage in a three-cycle reactor with continuous water intake against airflow, which solves the problem of mud accumulation at the bottom of the aeration tank for sewage treatment in the prior art, high energy consumption for aeration in the aeration tank, and low Influent water consumes electricity and the efficiency of synchronous nitrification and denitrification is low

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