Integrated sewage treatment device

Abstract

The invention provides an integrated sewage treatment device. A mud-water mixed solution sequentially flows through a mud-water mixing area, a primary biochemical area and a secondary biochemical area along the length direction of a box body, a part of sludge and a part of mixed solution in the secondary biochemical area are refluxed back to the mud-water mixing area by a refluxing mechanism and then return to the primary biochemical area to form a circulation, and nitrification liquid returned to the secondary biochemical area is subjected to denitrification reaction in the oxygen-deficient primary biochemical area to remove total nitrogen and improve the sewage treatment capacity. Moreover, the mud-water mixing area is arranged on the integrated sewage treatment device to ensure that refluxed sludge, inflow water and the mixed solution refluxed into the secondary biochemical area are mixed together, and then the mixture overflows out of a clapboard of the mud-water mixing area and enters the primary biochemical area, so that on the one hand, an effect of buffering water flow is achieved to ensure that liquids are mixed more fully, and on the other hand, the mud-water mixed solution flows into the primary biochemical area in the form of a line under the action of overflowing, and the retention time of the mud-water mixed solution is almost identical, so that the sewage treatment effect is stable.

Description

technical field [0001] The invention relates to the technical field of sewage treatment equipment, in particular to an integrated sewage treatment device. Background technique [0002] At present, the processes commonly used in my country's sewage treatment plants are ordinary activated sludge method, oxidation ditch method, SBR (intermittent activated sludge) method, AO (anoxic-aerobic biochemical treatment process) method, etc., which are similar to those developed in the United States and Germany. The technology and process adopted by the country are almost at the same level. The construction of a centralized large-scale sewage treatment station must be equipped with a large-scale pipe network to collect sewage. Due to the vast rural area and scattered distribution in our country, the investment cost is very high. [0003] Chinese patent document CN102659289A discloses a decentralized sewage treatment device consisting of a primary biochemical area, a secondary biochemical...

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Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of poor sewage treatment capacity and unstable treatment effect of the sewage treatment device in the prior art, so as to provide an integrated sewage treatment device with good sewage treatment capacity and stable treatment effect

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