Water diversion pollutant flushing device for city watercourse and sewage treatment method thereof

Abstract

The invention discloses a water diversion pollutant flushing device for a city watercourse and a sewage treatment method thereof. The water diversion pollutant flushing device comprises a water diversion pollutant flushing body and a drainage pipeline. The water diversion pollutant flushing body comprises a water diversion cross beam and a supporting base, a flood discharge plate is arranged on the top face of the water diversion cross beam, and the drainage pipeline is located on the side, close to an inner watercourse, of the water diversion pollutant flushing body. The method includes the steps of performing construction preparation, constructing an underwater static pressure pipe pile and a cutoff wall, installing a frame support and a wall face board, conducting water pumping construction, constructing a cement pedestal, installing and adjusting the water diversion pollutant flushing device, detaching the frame support and the wall face board, conducting outer watercourse water diversion and flood discharge and treating sewage. According to the method, river water in the outer watercourse is led to flush the city watercourse, so the self-cleaning capacity of city watercourse water is improved, and water quality pollution situations of the city watercourse are relieved; meanwhile, the flood discharge and floodwater drainage capacity is good, and economic benefits are remarkable.

Description

technical field [0001] The invention relates to a water diversion flushing device for urban rivers and a sewage treatment method thereof. Background technique [0002] With the rapid development of the national economy and the continuous expansion of the urban population, a large amount of industrial wastewater and domestic sewage are directly discharged into the inland river, resulting in serious pollution of the inland river, continuous siltation of the river, poor drainage, and a decline in drainage capacity. In some areas, severe waterlogging occurs when heavy rains hit . [0003] The urban river sewage treatment technology announced by the State Intellectual Property Office of China (application number: 2002112928.2, publication number: CN1376640, publication date: 2002.10.30), is suitable for eliminating sewage odor, reducing its COD value, and meeting the national sewage comprehensive discharge standard. Alum and calcium carbonate are used as sewage treatment agents,...

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Problems solved by technology

[0003] The urban river sewage treatment technology announced by the State Intellectual Property Office of China (application number: 2002112928.2, publication number: CN1376640, publication date: 2002.10.30), is suitable for eliminating sewage odor, reducing its COD value, and meeting the national sewage comprehensive discharge standard. Alum and calcium carbonate are used as sewage treatment agents, and the dosage is determined according to the COD value of the sewage. The COD value is between 150 and 1000, calculated per ton of sewage. The dosage of the two agents is: 0.8-2.0 kg of alum, 0.5-1.6 kg of calcium, of which calcium carbonate is a chemical synthetic product with a fineness of 1000-1200 mesh. Although the treatment method is simple and the cost is low, the pollution to the river is also increasing

[0004] A kind of river sewage treatment method and its special purification system announced by China State Intellectual Property Office (application number: 200710121287.3, publication number: CN101148288, publication date: 2008.03.26), the purification system of this river sewage comprises biological contact oxidation pond, The biological contact oxidation tank is composed of one or more anoxic / aerobic treatment units. The anoxic / aerobic treatment unit is composed of directly connected anoxic tanks or aerobic tanks with aeration devices. The anoxic tanks and The aerobic pools are equipped with fillers for enriching microorganisms; the method of the present invention is suitable for large fluctuations in river water quality and climatic conditions, has good adaptability to water quality changes, good impact load resistance, and can effectively eliminate black and odorous phenomena in river water. It does not produce a large amount of organic sludge, and has a good removal effect on organic carbon, nitrogen, and phosphorus. The quality of the treated water is stable, the amount of treated water is large, the project investment is small, and the operating cost is low. It is used to divert and treat various polluted river sewage , but the service life of this method is short, the effect on urban river sewage treatment is not obvious, and it does not have the ability of flood discharge and drainage

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