Method for realizing short-cut nitrification of municipal sewage by virtue of sludge double-reflux AOA process

Abstract

The invention relates to a method for realizing short-cut nitrification of municipal sewage by virtue of a sludge double-reflux AOA process and belongs to the sewage treatment field. A device mainly comprises a sewage raw water tank, a sludge double-reflux AOA reactor and a sedimentation tank, wherein the sludge double-reflux AOA reactor is formed by anaerobic / anoxic / aerobic grids. The device mainly comprises a raw water tank and the sludge double-reflux AOA reactor. According to the method, the sludge double-reflux AOA reactor is sequentially divided into an anaerobic section, an aerobic section and an anoxic section, wherein the anaerobic section is used for synthesizing an internal carbon source PHAs by virtue of COD in sanitary sewage and simultaneously carrying out anaerobic phosphor release; then a mixed liquid enters the aerobic section to generate short-cut nitrification; and finally, the mixed liquid enters the anoxic section to generate internal carbon source denitrification reaction. The ammonia nitrogen load in inflow water is gradually increased, and NOB is subjected to starvation treatment by virtue of long-term anaerobic / anoxic treatment, so that the internal source denitrification reaction of the short-cut nitrification of the municipal sewage is realized, and the deep nitrogen and phosphor removal purposes are achieved. The method is workable, and the problem that the short-cut nitrification of continuous flow is difficultly realized can be solved.

Description

technical field [0001] The invention relates to a control method for realizing short-range nitrification and endogenous denitrification of urban sewage through a sludge double-reflux AOA process, and belongs to the application field of continuous flow activated sludge method. Background technique [0002] In recent years, the phenomenon of "water body eutrophication" caused by excessive nitrogen in water has become more and more serious. Due to the increasingly stringent sewage discharge standards, the field of sewage treatment has also brought major challenges. The sewage treatment technology has entered the stage of simultaneous decarbonization and deep nitrogen and phosphorus removal from the single COD removal stage. In recent years, my country has invested a lot of money to control the eutrophication of water bodies. Although there are many sewage treatment processes, it is still necessary to develop processes or new methods to achieve deep denitrification and phosphor...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the current problems of difficulty in starting and maintaining short-cut nitrification, and difficulty in deep denitrification of sewage

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