Integrated AAO biological pool

Abstract

The invention discloses an integrated AAO biological pool which comprises an AAO biological pool unit and a sludge pump pool unit, wherein the AAO biological tank unit consists of a pre-anoxic zone, an anaerobic zone, an anoxic zone, an aerobic zone and a degassing zone which are connected in sequence; the sludge pump pool unit is arranged in the AAO biological pool unit in a manner of embedded inthe degassing area and located at the water outlet end of the tail end of the aerobic pool; the sludge pump pool unit and the aerobic zone are arranged by sharing a wall; and a sludge pump in the sludge pump pool unit is connected with the pre-anoxic zone and the anoxic zone of the AAO biological pool unit through channels arranged on the pool wall. According to the integrated AAO biological tank, the sludge pump unit is integrated in the AAO biological tank unit, sludge and sewage do not influence each other, sludge can flow back through a channel, and the problems that an independently-arranged sludge pump tank is large in occupied area, large in pipeline backflow energy consumption, inconvenient to maintain, high in construction and operation cost and the like are solved.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to an integrated AAO biological pool. Background technique [0002] The current conventional sewage plants mostly adopt the AAO main process including the AAO biological pool and the sludge pump pool which are set separately. [0003] In the existing AAO process sewage plant, the AAO biological tank and the sludge pump tank are usually divided into two separate units, and the position of the sludge pump tank is between the biological tank and the secondary sedimentation tank, and the sludge is introduced from the secondary sedimentation tank. The sludge discharge from the pool is divided into two sets of systems, which are composed of two pump sets: the external return sludge pump and the remaining sludge pump; the external return sludge is pumped to the water inlet of the biological pool, and the return flow is usually 100% of the design scale %, the remaining sludge is pumped to t...

AI Technical Summary

Problems solved by technology

[0008] Based on the problems existing in the prior art, the purpose of the present invention is to provide an integrated AAO bio-pool, which can solve the problem that the AAO bio-pool and the sludge pump pool are set separately in the existing AAO process sewage treatment project. The problems of high energy consumption for long-distance transportation of sludge pipelines, high cost of total return sludge pipelines, large floor area and large investment of sludge pump pools, etc.

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