Remodeling method of polluted river and lake bottom mud-water aerobic interface

Abstract

The invention discloses a remodeling method of a polluted river and lake bottom mud-water aerobic interface. The method comprises the steps of 1, analyzing bottom mud; 2, adding a potassium hydrogen persulfate composite salt solution; 3, adding a calcium peroxide solution; 4, aerating the surface layer of the bottom mud; 5, adding large benthonic animals; determining the distribution depth of the polluted bottom mud; adding the potassium hydrogen persulfate composite salt solution to the bottom of the bottom mud heavy pollution layer; adding the calcium peroxide solution to the bottom of the bottom mud heavy pollution layer; after the content of dissolved oxygen 20cm above the bottom mud-water interface is increased to 2mg/L or above and lasts for 1h, continuously aerating the surface layer of the bottom mud; and after the dissolved oxygen content at the position is increased by 4 mg/L or above and lasts for 1 h, adding large benthonic animals into the bottom mud. According to the invention, the aerobic condition of the bottom mud-water interface can be recovered, the depth of an aerobic oxidation layer in the bottom mud is increased, the content of organic pollutants in the bottom mud is reduced, and the polluted bottom mud is transformed into a water body pollutant digestion tank and aquatic organism appropriate soil.

Description

technical field [0001] The invention relates to the technical field of water pollution control and environmental restoration, in particular to a method for remodeling the aerobic interface of contaminated river and lake bottom mud-water. Background technique [0002] The sediment-water interface is one of the most important interfaces in the aquatic ecosystem, and it is a hotspot where substances participate in environmental geochemical cycles. With the participation of microorganisms, a series of physical, chemical and biological reactions occur near the sediment-water interface, which is an important way to regulate and control the exchange and transport of substances between sediments and water bodies. [0003] The dissolved oxygen status at the sediment-water interface is an important factor affecting the nutrient cycle pattern and biological distribution in the sediment. When the sediment-water interface is in an aerobic state, there will be an aerobic oxidation layer ...

AI Technical Summary

Problems solved by technology

However, the treatment process of in-situ covering technology is difficult to control, and the resuspension of sediment caused by wind-induced flow under natural conditions will greatly weaken the treatment effect

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