Urban river water environment treatment method

Abstract

The invention discloses an urban river water environment treatment method. Water in a riverway is isolated by using a water-stop wall and a soil-retaining pile along a riverbank retaining wall in theriverway to form a near-shore zone, and the near-shore zone has all functions of intercepting main pipes and collecting pollutants entering the riverway; the near-shore zone is divided into an ecological shallow water area and a local deep water area. River sludge and biological filler are filled in the ecological shallow water area, and aquatic plants are planted on the biological filler layer, so that all functions of purifying water quality, beautifying landscape and the like of the ecological floating island can be realized; the local deep water area is arranged at a river inlet, filled with river silt and covered with a biological filler, and the water bottom elevation is lower than that of the river inlet; sewage lifting pumps are arranged in the near-shore zone at fixed points, andvarious kinds of sewage in the near-shore zone are collected in a centralized mode and discharged into a municipal sewage system or enter an independent water treatment device. The method is convenient to construct, low in engineering investment, short in construction period and low in operation and maintenance cost, can effectively collect and treat pollutants entering the river, and has popularization and application prospects in the aspect of river water environment treatment.

Description

technical field [0001] The invention relates to a water environment treatment method for urban rivers, belonging to the fields of water environment treatment and water ecological restoration. Background technique [0002] With the advancement of urbanization in our country, the task of river water environment management is becoming increasingly arduous. The main pollutants in urban rivers come from domestic sewage and initial rainwater. On the one hand, the phenomenon of "misconnection, intercommunication and interpenetration" of sewage pipes and rainwater pipes in the urban drainage network has caused a large amount of domestic sewage to flow into the river; on the other hand, a large number of non-point source pollutants have passed through urban rainwater pipes Or drift into a river. These two types of pollution sources are widely distributed and have a large amount of pollution. It is difficult to collect and treat them, which seriously affects the quality of urban riv...

AI Technical Summary

Problems solved by technology

Among them, the collection and treatment of pollutants entering the river is the fundamental strategy for urban river water environment governance. However, at present, the rainwater and sewage diversion system in my country is not perfect, and the structural and functional defects of the sewage pipe network are very common. Therefore, it is difficult to effectively control exogenous pollutants entering the river

The river dredging project involves large-scale dry river operations, and the construction is relatively difficult. Moreover, the release of water and soil pressure during the construction process will cause safety hazards to the bank wall. Collapse accidents of old revetments occur frequently, and the disposal cost of the cleared silt is very high.

Finally, although the ecological floating islands that are often used to purify water can improve the natural ecological environment of rivers, their production and construction period is long, management and maintenance costs are high, it is difficult to survive winter, and it is difficult to withstand wind and waves. These problems and shortcomings have restricted the promotion of this technology

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