Beach platform constructed wetland system for reducing entering-river non-point source pollution

Abstract

The invention provides a beach platform constructed wetland system for reducing entering-river non-point source pollution, and belongs to the field of water pollution control and treatment. The systemspecifically comprises a grass planting ditch, an overflow well, a water distribution channel, an ecological retention pond, two wetland treatment units, a water collection channel and an emptying drainage channel, wherein the grass planting ditch is used for collecting sewage polluted by a non-point source and is communicated to the overflow well through a drainage pipeline, the overflow well isconnected to the water distribution channel through a connecting pipe, the water distribution channel distributes water to the ecological retention pond through a water distribution pipeline, the ecological retention pond is sequentially connected to the two wetland treatment units through connecting pipelines, collecting is performed by the water collection channel, collected materials are discharged into a river channel, and the overflow well, the water distribution channel, the ecological retention pond, the first-stage platform wetland treatment unit, the second-stage platform wetland treatment unit and the water collection channel can be emptied to flow into the emptying drainage channel. The system of the invention can achieve the effective collection and filtration purification ofnon-point source sewage, and ensure the quality of water entering rivers.

Description

technical field [0001] The invention relates to the field of water pollution control and treatment, in particular to a river beach platform artificial wetland system for reducing pollution from river surface sources. Background technique [0002] The management of non-point source polluted rivers is one of the hot spots in the field of comprehensive water environment management. The main sources of non-point source pollutants include agricultural and rural non-point source pollution, rainwater runoff, and dry and wet deposition. Among them, agricultural and rural non-point source pollutants mainly come from aquaculture, planting and rural domestic sewage. Rainwater runoff pollutants are divided into initial rainwater in rainwater pipe network and initial rain runoff in areas without rainwater pipe network according to whether there is rainwater pipe network. In addition, wet and dry deposition pollutants directly entering river water bodies are also included. [0003] The...

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Problems solved by technology

[0005] (1) Farmland surface runoff, farmland drainage and underground seepage are not easy to collect into constructed wetlands, and after purification and reduction, they directly enter the water body to form non-point source pollution;

[0006] (2) When the concentration of pollutants in rainwater runoff is high, silt and clogging will occur in traditional constructed wetlands, which will reduce hydraulic conductivity, wetland treatment effect and operating life;

[0007] (3) In rainy weather, the initial rainwater and other rainwater with better water quality pass through the traditional artificial wetland without considering the overflow condition, resulting in a large processing load

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