Black and odorous river comprehensive treatment and ecological restoration method

Abstract

The invention belongs to the field of a river treatment technology and relates to a black and odorous river comprehensive treatment and ecological restoration method. Specifically, a river is divided into a sewage diversion and collection area, a sewage deep purification area and a water body ecological system construction and water quality purifying area according to location. The sewage diversion and collection area is an area of a channel being 0.5-2 m wide; the deep purification area is an area of a channel being 50-100 m long from an upstream end to a downstream end; and the water body ecological system construction and water quality purifying area is a channel bottom. The three areas are respectively treated. By measures of eliminating black and odorous pollutants, purifying water body, beautifying environment and reconstructing ecological system, etc., black and odorous river can be treated and the ecological system can be restored.

Description

technical field [0001] The invention belongs to the technical field of river treatment, and relates to a method for comprehensive treatment and ecological restoration of black and odorous rivers. Background technique [0002] The sewage pipe network and sewage treatment facilities are not perfect, the rain and sewage are not separated, the indirect (direct) inflow of domestic sewage and industrial waste water and the accumulation for many years have resulted in the formation of many black and smelly rivers around the old city. Both sides of the black and smelly river are slumped and overgrown with weeds; the river water is black and smelly, and it is no longer suitable for fish and shrimp to survive; the "mud drift" that floats on the river surface sinks and floats, and foul-smelling bubbles rise from time to time, which looks very depressed; The ecosystem has long been destroyed, and the natural purification function is weak, causing the water body to continue to deteriorat...

AI Technical Summary

Problems solved by technology

River dredging can reduce a large amount of organic carbon, nitrogen, phosphorus and other nutrients accumulated in the water body. It is an effective way and measure to reduce endogenous pollution and reduce black and odorous water bodies. However, dredging may destroy the original biological population of the river. structure and habitat, which weakens its self-purification function, and has the disadvantages of long construction period, short after-effect period, and high cost; water diversion is to dilute the polluted water body with the method of "clearing and releasing pollution", which can make the water body black and smelly. Water quality indicators such as total phosphorus, organic pollution indicators, and permanganate index concentration have declined, but maintenance costs are high and water resources are wasted more; chemical flocculation treatment technology is a method of removing pollutants in the water layer by adding chemicals to achieve The sewage treatment technology to improve water quality has the characteristics of fast and high efficiency, but it has the disadvantages of secondary pollution risk and short post-effect period.

[0004] At present, the treatment of black and odorous rivers has become a major project of environmental protection engineering, but there is no simple and effective way to solve this problem