Integrated sewage treatment system

Abstract

The invention belongs to the technical field of environmental engineering sewage treatment, and particularly relates to an integrated sewage treatment system. The device integrates four functional units including an anoxic biological regulation tank, a suspended filler biological reaction tank, a secondary sedimentation tank and a sludge storage tank. A circular vertical flow type secondary sedimentation tank is arranged in the middle of the reactor, wherein the other three functional units are distributed around the central secondary sedimentation tank in a radial shape, and the whole device is of a cylindrical structure in appearance. Rural decentralized domestic sewage is uniformly distributed into the anoxic biological regulation tank through a pipeline, is hydrolyzed and acidified, and then is lifted by the sewage air lifter to enter the suspended filler biological reaction tank; wherein the spherical suspended filler with the filling ratio of 40-50% is put, and the sewage enters the central secondary sedimentation tank through the intercepting net at the overflow hole; finally, the sediment is separated from mud and water, collected by a triangular weir and discharged by a water collecting tank; the nitration liquid of the suspended filler biological reaction tank flows back to the anoxic biological regulation tank through a nitration liquid air lifter, and denitrification nitrogen removal is carried out by utilizing an inlet water organic carbon source.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to an integrated sewage treatment system. Background technique [0002] my country has a total of 3.207 million natural villages, 634,000 administrative villages, 22,000 market towns, and nearly 20,000 official towns. According to statistics, the drainage volume of counties, towns, and villages in my country currently accounts for about 50% of the total drainage volume of the country. However, 96% of villages and towns do not have drainage channels and sewage treatment systems, and the sewage treatment rate in counties is only about 11%. More than 1%, a large amount of production and domestic sewage are discharged randomly, causing serious pollution of surface and underground water sources in small towns and rural areas, not only accelerating the eutrophication process of rivers, lakes, reservoirs and other water bodies, but also seriously threatening the safety o...

AI Technical Summary

Problems solved by technology

However, for the decentralized domestic sewage treatment in rural areas, there are some deficiencies in the relevant suspended packing bed patents: ① The degree of integration and intensification is not high, it occupies a large area, and wastes a lot of processing or construction materials

Moreover, the pretreatment system and the sludge treatment system are separated from the main treatment system, such as an integrated sewage suspension carrier treatment process with the publication number CN1843981A; Bed biochemical denitrification and phosphorus removal methods involve sewage lifting pumps, excess sludge pumps, return pumps, blowers, mixers, scraper suction machines, and dosing systems, resulting in large system investment and complicated operation and process control; ③ using pumps to lift , easy to block, requires liquid level control, complicated maintenance process

At the same time, it is difficult to select a lift pump with a small flow rate; ④ The sludge treatment is not considered, and the sludge management is troublesome

The above problems limit the application of suspended packed bed technology in rural decentralized sewage treatment

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