Estuarine constructed wetland system for improving water quality of river

Abstract

The invention relates to an estuarine constructed wetland system for improving the water quality of a river. In view of the inferior class V urban rivers consisting of reuse water discharged by municipal sewage treatment plants, domestic sewage, rainwater runoff and the like, a rotary corridor is set up in the estuary area, wetland patches and rubber dams are built, the water level is controlled by prolonging the hydraulic retention time, a matrix and plants thus can achieve degradation and removal of pollutants, the purification of water of the river is thus achieved, and pollution to the next river is reduced. The plants are easy to maintain and manage, the maintenance cost is low, the selected matrix is stable in operation, blockage does not easily occur, and the system has the advantages of wide application range, simple operation and maintenance, low investment, low construction cost and low energy consumption.

Description

Technical field [0001] The invention relates to the field of restoration of aquatic ecological environment, in particular to an estuary artificial wetland system that uses wetland patches, revolving corridors and rubber dams to purify river water quality. Background technique [0002] With the rapid development of the economy and the improvement of human living standards, the problem of water environment pollution is increasing, rivers are generally polluted, and the pollution situation of urban rivers is more severe. Although the total pollution of these rivers is not as good as that of major rivers, the concentration of pollutants has reached a very high level, especially causing serious pollution to the main stream. According to the "Surface Water Environmental Quality Standards" (GB3838-2002), many rivers around cities are still inferior to Grade V. Most of the water bodies of these rivers come from reclaimed water, domestic sewage, and rainwater runoff discharged from urban...

AI Technical Summary

Problems solved by technology

Although the system has a good landscape effect, the residence time of the river water passing through the estuary is very short, and the adsorption of pollutants by aquatic plants alone is very limited, and a good purification effect cannot be achieved.

CN108706740A discloses a technical method for improving denitrification performance in estuary wetlands. This method only uses ecological corridors and purification belts composed of aquatic plants to purify water quality, mainly for the removal of nitrogen, without adding matrix fillers, and for the removal of pollutants The effect is very limited, and it is vulnerable to damage when encountering large amounts of water or even floods during the rainy season

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