River course ecological system for treating non-point source low-pollution water

Abstract

The invention relates to a river course ecological system for treating non-point source low-pollution water. According to the river course ecological system, ecological dirt blocking ditches are built at the two sides outside river banks of a river course, so that non-point source high-pollution water from agricultural runoff and rural sewage cannot directly enter the river course and is prevented from being mixed with river water to form into a large amount of low-pollution water to affect the river water quality; meanwhile, estuarine artificial wetland systems are built at outlets of the ecological dirt blocking ditches to forcefully treat sewage which is guided by the ecological dirt blocking pollutant intercepting ditches to enter the river course; and three-stage ecological bank protection comprising emergent aquatic plants, wetland plantsbog plants and shrubs and arbors is built at the inner sides of the river banks of the river course so as to improve the self-purification capacity of the water body in the river course and the flood control capacity. The river course ecological system comprehensively solves the problems of collection and treatment of the non-point source low-pollution water in terms of source pollution interception enhancing, river course self-purification capacity improving and pollution outflow controlling.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a river ecosystem for treating non-point source low-pollution water. Background technique [0002] In recent years, with the strengthening of point source pollution control, non-point source pollution, mainly rural domestic sewage, farmland runoff and livestock and poultry breeding sewage, has become the focus of pollution control in river and lake basins. Studies have shown that the occurrence of these sewage is mainly positively correlated with the amount of surface runoff. After the rainfall is mixed with the upstream water of the river, the concentration of pollutants in the runoff has dropped significantly, and the nutrients and carbon sources in the water are far lower than the standards of domestic sewage. , This type of sewage with a large amount of water and low concentration is usually called low-pollution water or slightly-polluted water. According to the abo...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the above problems in the treatment of non-point source low-pollution water in river and lake basins, to propose a river ecosystem for processing non-point source low-pollution water, and to establish a treatment system formed by combining ecological sewage intercepting ditches, ecological revetments, and estuary artificial wetlands In the river ecosystem of non-point source low-pollution water, the present invention three-dimensionally solves the problem of collection and treatment of non-point source low-pollution water from three aspects: strengthening source pollution interception, improving self-purification ability of river course and controlling pollution outflow

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