AA-MBBR sewage treatment system and sewage treatment method

Abstract

The invention discloses an AA-MBBR sewage treatment system. The AA-MBBR sewage treatment system comprises a water inlet pond, a water inlet pump, an anoxic MBBR pond, a main reaction pond, a sludge refluxing pump and a secondary sedimentation tank. The water inlet pond is connected to the anoxic MBBR pond via a water inlet tube through the water inlet pump; the main reaction pond is divided into an aerobic MBBR pond positioned in the outer ring and an anaerobic pond positioned in the inner ring; a water outlet tube of the anoxic MBBR pond is connected into the anaerobic pond in the inner ring of the main reaction pond through a pipeline; an aerator tube is arranged at the bottom in the aerobic MBBR pond and is provided with an aerator; a refluxing hole is formed in the bottom of the anaerobic pond; a water inlet hole which communicates to the inside of the aerobic MBBR pond is formed in a position, which is close to the bottom, of the anaerobic pond; a water outlet is formed in the upper part of the outer side of the main reaction pond and is connected into the secondary sedimentation tank via a pipeline; the bottom of the secondary sedimentation tank is connected with a refluxing tube; and the secondary sedimentation tank is connected to the refluxing hole of the anaerobic pond via the refluxing tube through the sludge refluxing pump. The AA-MBBR sewage treatment system is high in nitrogen and phosphorus removal ability and good in effect.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an AA-MBBR sewage treatment system and a sewage treatment method. Background technique [0002] Because the traditional activated sludge process can achieve high carbon removal efficiency relatively simply, most of the urban sewage treatment plants in my country, especially in the early design and construction, adopt this process. As human beings pay more and more attention to environmental protection issues, the amount of sewage discharge has increased sharply and the requirements for sewage treatment have become increasingly stringent. Countries around the world, including my country, have put forward higher and higher requirements for sewage treatment rates and sewage treatment standards. , the traditional process has been difficult to meet the ever-increasing requirements in terms of processing versatility, high efficiency and stability, and economic rationality. The...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of poor denitrification and phosphorus removal ability of the traditional activated sludge process, and provide a kind of AA-MBBR sewage treatment system and sewage treatment method based on the transformation of the traditional activated sludge process

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