In-situ restoration system and method for river-lake bottom mud polluted by heavy metals

Abstract

The invention relates to the technical field of in-situ restoration and dewatering for pollution of river-lake bottom mud and particularly relates to an in-situ restoration system and method for the river-lake bottom mud polluted by heavy metals. The system comprises a steel-plate mold frame with a square-shaped structure, wherein the lower part of the steel-plate mold frame is inserted and driveninto the river-lake bottom mud; a volatile organic pollutant gas collecting bag is arranged at the upper part of the steel-plate mold frame and is connected to a volatile organic pollutant gas disposal system by a gas suctioning pipeline; the four corners of the steel-plate mold frame are respectively provided with a non-volatile organic pollutant disposal device I, a heavy-metal and volatile organic pollutant disposal device, a non-volatile organic pollutant disposal device II and a non-volatile organic pollutant disposal device III; the steel-plate mold frame is also provided with an electric restoration system and a sewage discharging system. The in-situ restoration system and method have the beneficial effects that electric restoration and dewatering technologies are applied in disposal of the river-lake bottom mud simultaneously, the economic-practical effects and the environment-friendly effect are achieved, the effect is better, the method is simple in operation, and no secondary pollution is generated.

Description

technical field [0001] The invention relates to the technical field of in-situ restoration and dehydration of river and lake bottom mud pollution, in particular to an in-situ restoration system and method for heavy metal polluted river and lake bottom mud. Background technique [0002] In recent years, due to a series of physical, chemical and biochemical processes such as municipal sewage, industrial wastewater, agricultural wastewater, surface runoff, and atmospheric dustfall, some or most of them have been deposited at the bottom of rivers and lakes, resulting in eutrophication of lakes and rivers. Lake bottom mud is not only an important reservoir of organic and heavy metal pollutants, but also a potential secondary pollution source of water bodies, and seriously endangers human health through the food chain. Reasonable disposal of bottom mud is one of the important ways to fundamentally solve water pollution. Sediment disposal needs to solve two problems, one is the rem...

AI Technical Summary

Problems solved by technology

[0005] In view of the above problems, the present invention provides an in-situ repair system and method for heavy metal-contaminated river and lake sediments, which effectively solves the technical problem of lack of effective and unified simultaneous restoration and dehydration of heavy metal and organic pollution in the existing river and lake sediment disposal process

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