Constructed wetland for interception and treatment of sewage at outfall of river channel

Abstract

The invention relates to a constructed wetland for interception and treatment of sewage at the outfall of a river channel. The constructed wetland comprises interception filtering net racks and an interception revolving door, wherein the interception filtering net racks, the interception revolving door and a river bank form sewage-intercepting internal treating space through enclosure; the interception revolving door just faces the outfall of the river bank; each of the interception filtering net racks is of an inner-outer double-layer net rack structure and is peripherally covered with a filter net cover; the interception filtering net racks are internally filled with filter packing; aquatic plants are planted on the filter packing; and a water body in the sewage-intercepting internal treating space is provided with a plurality of biofilm colonization packing materials, a plurality of slow-release carbon source supplementing tubes and a plurality of oxygen-increasing phosphorus-locking supplementing tubes. The constructed wetland of the invention can realize high-efficiency purification of pollutants in drainage, effectively reduce the content of nitrogen-phosphorus organic pollutants in the drainage and guarantees the flood discharge capacity of the outfall of the river channel.

Description

technical field [0001] The invention belongs to the technical field of artificial wetland water purification, and in particular relates to an artificial wetland for sewage interception treatment at river outlets. Background technique [0002] As an important carrier of urban surface water resources, urban water bodies not only perform the natural function of material and energy transport, but also have functions such as water supply, flood discharge, drainage, irrigation, shipping, landscape, and tourism. Due to the long-term high-speed economic and social development, many urban water bodies in my country are facing serious oxygen-enriched oxidation and even black and odorous problems. At present, with the gradual deepening of ecological civilization construction, the governance of urban black and smelly rivers is gradually put on the agenda. Many cities have established a "river chief system" to carry out ecological restoration of urban black and odorous water bodies. Pr...

AI Technical Summary

Problems solved by technology

Pollution entering urban water bodies through rainwater pipes, it is difficult to maintain the long-term stability of river water quality only by means of ecological restoration in the river

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