Bypass offline river purifying method and purifying system

Abstract

The invention relates to a bypass offline river purifying method and a bypass offline river purifying system. According to the invention, a branch of a polluted river is adopted as a basis; a drainage channel is constructed, such that a bypass is formed; polluted river water is introduced into the bypass from the branch, such that the retention time of the polluted river water in the bypass is increased; in the bypass, pollutants are removed with offline and online ecological engineering technology and environmental engineering technology; and purified water flows into a main stream, such that river water quality is improved, and river ecosystem is restored. The invention also discloses a purifying system used for realizing the bypass offline river purifying method. According to the invention, main stream river channel original status is not changed, main stream flood protection is not influenced, and water quality purification and ecological restoration effects are good. The method and the system are suitable for ecological management and ecological restoration of polluted river with rich branches, dense drainage irrigation channels, or developed ponds.

Description

technical field [0001] The invention belongs to the field of river ecological control and ecological restoration, and in particular relates to a method for improving the water quality of polluted rivers and restoring river ecology. [0002] The invention also relates to a purification system for carrying out the above method. Background technique [0003] At present, our country is facing the dual problems of water resource shortage and water environment pollution, among which the problem of river pollution is extremely prominent, so the technical demand for improving river water quality is extremely urgent. At present, the main excessive pollutants in rivers are COD (Chemical Oxygen Demamd, chemical oxygen demand) and ammonia nitrogen. [0004] At present, the river pollution remediation modes are mainly divided into source control, online treatment, offline treatment, comprehensive treatment and other modes. [0005] Source treatment is to deal with pollution sources fro...

AI Technical Summary

Problems solved by technology

However, because the process requires sufficient hydraulic retention time, it often requires a large-scale treatment plant area, and it is difficult to obtain land in urban rivers, which poses a great obstacle to the promotion of off-line treatment technology.

In addition, the construction of large-scale treatment facilities requires a large amount of investment. In most cases, it needs to consume power to raise water, so it needs to bear higher infrastructure costs and operation and maintenance costs.

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