Sequencing batch intermittent aeration three-phase fluidized bed and sewage treatment method

Abstract

The invention discloses a sequencing batch intermittent aeration three-phase fluidized bed and a sewage treatment method, wherein the sequencing batch intermittent aeration three-phase fluidized bed comprises a tank body, two carrier separator groups communicating a sedimentation tank and reaction zones, two water decanters arranged in the reaction zones, a water inlet pipe communicated with the sedimentation tank, and an aeration device, wherein the tank body comprises a reaction tank, the sedimentation tank and a clapboard; the sedimentation tank, the reaction tank and the clapboard form the two reaction zones in an encircling manner; the aeration device comprises an aeration draught fan, a three-way valve and an aerator pipe. The treatment method is as follows: sewage is introduced into the sedimentation tank until the sewage overflows into the reaction tank, the two reaction zones are alternatively aerated, so that the two reaction zones are subjected to partial nitrification alternatively, and an effluent is subjected to standing. On one side, the sedimentation tank is arranged in the reaction tank, the two reaction zones are formed through the separation of the clapboard so as to be beneficial for the anaerobic treatment and aerobic treatment of the sewage sequentially, and the sewage treatment efficiency is improved; on the other side, the three-way valve is controlled to alternatively aerate the two reaction zones so as to be beneficial for the partial nitrification reaction of the two reaction zones alternatively, the reaction efficiency is improved, and the energy consumption is reduced.

Description

technical field [0001] The invention relates to sewage treatment technology, in particular to a sequence batch type intermittent aeration three-phase fluidized bed and a sewage treatment method thereof. Background technique [0002] The traditional sequencing batch activated sludge process includes the SBR (Sequence Batch Reactor) method and the periodic activated sludge process CASS (Cyclical Actived Sludge System) formed by the deformation of the SBR method. [0003] SBR is the abbreviation of Sequenced Batch Activated Sludge Process, which is an activated sludge sewage treatment technology operated by intermittent aeration. Its main feature is the orderly and intermittent operation in operation. The core of SBR technology is the SBR reaction tank, which integrates the functions of homogenization, primary sedimentation, biodegradation and secondary sedimentation into one tank, without sludge return system. It is especially suitable for occasions with intermittent discharg...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the above-mentioned technical deficiencies, propose a sequential batch type intermittent aeration three-phase fluidized bed and its sewage treatment method, and solve the problem of high energy consumption, poor effect, and land occupation of aeration in the sewage treatment process in the prior art. large technical issues

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