Structure of spiral-flow aeration sedimentation sewage treatment tank and using method thereof

Abstract

The invention relates to a structure of a spiral-flow aeration sedimentation sewage treatment tank and a using method thereof to organically combine main technological processes of air flotation separation and biological treatment into a container, wherein the four corners or the periphery of the container are provided with a fixed water-raising aerating apparatus and the middle part of the container is provided with a floating water-raising aerating apparatus; the sewage at a bottom layer is aerated selectively, and the sewage in the container is aerated circularly and alternately at the same time; the water-raising aerating apparatus is formed by mounting a gapped combined aerator in a vertical pipe frame; the fixed water-raising aerating apparatus and the floating water-raising aerating apparatus can be used singly or together; the water-raising aerating apparatuses stir and mix the sewage in the container and make use of deep drainage to aerate the sewage circularly and alternately; after a period of time of aeration treatment, membrane holes under middle-layer membranes are opened, the clearances among the middle-layer membranes are furled, aerobic treatment is performed on the sewage above the middle-layer membrane, and anaerobic treatment is performed on the sewage below the middle-layer membrane; and the sewage and most of activated sludge after the treatment are discharged, and a new sewage treatment cycle is restarted.

Description

(1) Technical field [0001] The present invention relates to a sewage and waste water treatment device and use method, more precisely, the present invention is applicable to the treatment device and use method for biological treatment of sewage and waste water under aerobic, anoxic and anaerobic conditions simultaneously. (2) Background technology [0002] The earliest combined sewage treatment complete mixing system is generally a circular pool. The middle of the pool is a fully mixed aerated biochemical area, the outside is a diversion area and a sedimentation area, and there is a sludge return slot at the bottom. This is a small system. , the concentration of pollutants in the aeration zone is equivalent to the concentration of the sedimentation and removal water after treatment. Therefore, the combined sewage treatment complete mixing system has low efficiency, poor effect, large floor area, and low promotion and use value. [0003] The existing ordinary activated sludge ...

AI Technical Summary

Problems solved by technology

Activated sludge is a new force to remove pollutants. The processing capacity of the sewage treatment mixing system will increase with the increase of the concentration of activated sludge in the sewage treatment mixing system, but the increase of the return sludge flow increases the hydraulic load of the sedimentation tank, and also increases The total amount of sludge entering the sedimentation tank will increase the concentration of floating solids in the effluent of the sedimentation tank. In severe cases, the entire treatment system will not work properly.

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