Efficient composite wetland system for reducing rainfall runoff pollutants

Abstract

The invention provides a high-efficiency composite wetland system for reducing rainfall runoff pollutants, which includes a sedimentation area, a surface flow wetland, a deep purification unit and a water collection well. The sedimentation area precipitates impurities such as silt and other large particles in the rainfall runoff to reduce pollution The blockage of wetland filler and the ups and downs of the surface flow wetland not only play the role of hydraulic regulation, but also form a certain landscape water surface. When the rainwater is flowing, the organic pollutants in the water are removed through submerged plants, etc., and the depth The purification unit removes ammonia nitrogen and phosphorus in the water, and the fully purified rainwater is discharged through the gate on the water collection well; the liquid level is controlled by the water level control device, and the rainfall runoff can stay in the wetland system for a long time to achieve the purpose of sufficient purification. It is necessary to adjust the water level of the wetland system, which solves the problems of poor decontamination effect and low decontamination efficiency caused by the lack of water level control function of the existing traditional constructed wetland.

Description

technical field [0001] The invention relates to the technical field of constructed wetlands, in particular to an efficient composite wetland system for reducing rainfall runoff pollutants. Background technique [0002] Generally speaking, water pollution sources are divided into two categories: point source pollution and non-point source pollution, which are controlled by different treatment methods. Point source pollution has a clear discharge point (such as domestic sewage and industrial wastewater discharged from residential areas or industries), which can be easily collected through the pipe network and sent to the sewage treatment plant for treatment. The non-point source pollution has a large distribution range, including pollutants that have been deposited in farmland planting areas, land, grassland, forest land, construction sites, and roads. The runoff enters the natural water body, which is difficult to treat and control. Common treatment methods used to reduce n...

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Problems solved by technology

[0004] Aiming at the above-mentioned problems in the prior art, the present invention provides a high-efficiency composite wetland system for reducing rainfall runoff pollutants, which solves the problem of poor decontamination effect and decontamination caused by the lack of water level control function of existing traditional constructed wetlands. The problem of low pollution efficiency

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