In-situ control method for polluted lake and pond sediment

Abstract

The invention discloses an in-situ control method for polluted lake and pond sediment. An immobilized microbial device is hung and fixed on a lake and pond mud and water interface, a micro-porous aeration device comprises an aeration head and an air compressor, the aeration head is placed in a microbial carrier of the immobilized microbial device, and the air compressor is connected with the aeration head through an air supply conduit; aeration is performed by the micro-porous aeration device, dissolved oxygen is provided for sediment and lake and pond water, and microorganisms propagated in the immobilized microbial device are diffused in the sediment and the lake and pond water. With the adoption of the method, a thick brown oxide layer is formed on the surface of the sediment, becomes a natural masking agent, stops release of lower-layer sediment pollutants and plays a masking and covering role; the masking agent cannot increase the size of the sediment and is also applicable to shallow water areas; the masking agent causes no damage to an aquatic environment system and can provide habitats for the microorganisms; maintenance is convenient, start is quick, operation is simple, energy consumption is low, no secondary pollution is caused, and separation is easy.

Description

technical field [0001] The invention belongs to the field of water environment treatment, and in particular relates to a method for in-situ control of polluted lake bottom mud. Background technique [0002] With the development of cities and the acceleration of industrialization, a large amount of wastewater is discharged into urban rivers and lakes. Due to the lack of timely and effective treatment, a large number of pollutants are deposited in the bottom mud. When the water environment changes, the pollutants in the bottom mud It is re-released into the overlying water and becomes a secondary pollution source. In recent years, with the control of exogenous pollution, the release of sediment pollutants has become the main source of pollution affecting water quality in rivers and lakes. Especially in closed landscape lakes and ponds, the release of sediment nutrients has gradually become the main cause of eutrophication in lakes and ponds. Studies have shown that when the ...

AI Technical Summary

Problems solved by technology

However, the traditional in-situ biotechnology of sediments uses free dominant bacteria, which has disadvantages such as low concentration of effective degrading bacteria per unit volume, easy loss of bacteria under severe water conservancy conditions, and weak competition with indigenous bacteria.

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