Strengthening treatment method of town heavily polluted river water in situ creatures

Abstract

The invention belongs to the field of ecology and environment protection and relates to a strengthening treatment method of town heavily polluted river water in situ creatures. The method includes that a heavily polluted river reach is divided into four continuous sections of a water purification film filtering section, a biological grid filtering section, an artificial flow making section and a wetland arranging section to serve as sewage water treatment units, the sewage water firstly enters into the water purification film filtering section and automatically flows into the biological grid filtering section, a biological substrate modifying agent is released into the whole heavily polluted river reach to perform substrate modification for the whole heavily polluted river reach, the sewage water flows into the artificial flow making section and enters into the wetland arranging section, and then field snails, clams and crassostrea gigas are thrown into the river reach to implement bottom-dwelling animal control cultivation for the heavily polluted river water of the whole river reach. The method has the advantages that the river reach serves as a treated carrier, combination technologies such as micro nano bubble reaeration, efficient water purification film and biological grid filtering, river channel substrate modification, artificial flow making, floating island type wetlands and bottom-dwelling animal control cultivation are reasonably collocated, the water quality is continuously improved, and simultaneously the positive cycling of the water ecological system is achieved.

Description

technical field

[0001] The invention belongs to the field of ecology and environmental protection, and in particular relates to an in-situ biointensified treatment method for heavily polluted river water in villages and towns. Background technique

[0002] Villages and towns in some economically developed areas of my country have a high population mobility and a large number of migrant workers. Especially, villages and towns near some large and medium-sized cities have become the first choice for migrant workers because of relatively cheap housing rental prices. Most of the villages and towns in the economically developed southern regions such as the Yangtze River Delta and the Pearl River Delta are built along the river (bang, chung), and the residents live along the river. The domestic sewage generated and the tail water and agricultural non-point source sewage discharged by enterprises in some villages and towns industrial concentration areas meet the standards. Directly ...

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