Integrated anaerobic anoxic aerobic treatment device for sewage treatment

Abstract

The invention relates to an integrated anaerobic-anoxic-aerobic treatment device for sewage treatment. The reaction pool is a cylindrical structure with an upper end opening, and an inner partition wall and an outer partition wall are arranged inside, and the inner partition wall is arranged inside the outer partition wall. The inner partition wall and the outer partition wall divide the inner chamber of the reaction tank into an aerobic chamber, an anoxic chamber and an anaerobic chamber which are arranged sequentially from the inside to the outside. Device, the top of the inner partition wall is fastened with a diversion cover, and a gas collection cover is arranged above the diversion cover. During the upward flow of the mixed liquid in the aerobic chamber and the air, part of the liquid flows downward along the diversion cover into the anoxic chamber. , to realize the self-reflux of the nitrification solution in the aerobic chamber, and the other part flows upward with the air into the gas-liquid separation device for separation, the air is discharged, and the sludge flows evenly into the lower part of the anaerobic chamber along the mud distribution pipe, realizing the self-reflux of activated sludge , so that A 2 O The unpowered self-reflux of sludge and nitrification solution in the sewage treatment process saves energy and reduces costs.

Description

technical field [0001] The invention relates to the technical field of biological reaction equipment in sewage treatment, in particular to an integrated anaerobic-anoxic-aerobic treatment device for sewage treatment. Background technique [0002] At present, the activated sludge process in urban sewage treatment is almost all realized based on the "anaerobic, anoxic, aerobic" growth and metabolism theory of organisms, that is, organic matter, nitrogen, phosphorus and other pollutants in sewage Under different environments, it can be removed through the growth and metabolism of microorganisms to achieve the purpose of purifying water. According to different sewage treatment processes, anaerobic, anoxic and aerobic can be used in combination according to needs, such as anaerobic-aerobic combination, anoxic-aerobic combination, anaerobic-anoxic-aerobic combination, of which anaerobic -The hypoxic-aerobic combination is generally referred to as A 2 O sewage treatment process, ...

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Problems solved by technology

[0004] It can be seen that the anaerobic reaction needs the returning sludge after the aerobic reaction, and the anoxic reaction needs the nitrifying liquid returning in the aerobic tank. Realize, moreover, most of the aerobic pools, anaerobic pools and anoxic pools in the existing sewage treatment plants are split independent pool structures, and the split independent pool body structure and the use of pump backflow have a large footprint and can Disadvantages such as high consumption

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