In-situ remediation method for water in black and odorous river

Abstract

An in-situ remediation method for water in a black and odorous river comprises steps as follows: (1), pollution indexes of the water in the river are detected; (2), the river is pre-treated, the water in the black and odorous river is oxygenized in a biological oxygen enrichment method, and the concentration of dissolved oxygen in a river aquatic system is kept between 2 mg / L and 8 mg / l; (3), carbon fiber ecological grass is laid in the black and odorous river in the downstream direction, one end of the carbon fiber ecological grass is fixed on an iron framework, the iron framework is fixed at the bottom of the river through a weight or an anchor, and the laying density of the carbon fiber ecological grass is 40 cm<2> / L after biofilm formation; (4), after primary biofilm formation of the carbon fiber ecological grass in 3-5 days, cultured indigenous microorganisms are sprayed to starting ends of different water area sections of the black and odorous river in a liquid water-surface spraying manner, the microorganism feeding area accounts for 41% of the water area, and the ratio of fed microorganisms to water amount in areas with different water quality is (2-5):104. The in-situ remediation method solves the increasingly serious blackening and odor problem of the river, and the water remediation method is low in development cost and operation expense and safe.

Description

technical field [0001] The invention relates to a method for restoring black and odorous river water. Background technique [0002] With the continuous growth of the national economy, the continuous expansion of industrial scale, the continuous increase of urban population, the discharge of industrial wastewater and domestic sewage is increasing, and a large amount of pollutants flow into rivers and lakes without treatment, causing a large amount of water resources to be polluted. Rivers are important It is one of the fresh water resources in China, and it is also an important component of water sources. It is closely related to people's production, life and sustainable economic development. Rivers are rich in water, water conservancy and aquatic resources, and also have the functions of maintaining biodiversity, regulating climate, storing floods, regulating surface runoff, and ecologically restoring water quality. However, with the rapid development of industry and agric...

AI Technical Summary

Problems solved by technology

However, with the rapid development of industry and agriculture in our country, the acceleration of urbanization and the low-level and extensive economic development model, the discharge of industrial wastewater and domestic sewage is increasing, and a large amount of nutrients continue to flow into rivers, which has caused adverse effects on many rivers. Black and odorous rivers have become a common pollution problem in small and medium-sized rivers in cities in my country. Black and odorous rivers have extremely serious impacts on the urban environment, not only affecting the appearance of the city, but also affecting the life and health of surrounding residents.

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