Method for applying treated river and lake silt to land-water ecotone plant planting medium

Abstract

The invention discloses a method for applying treated river and lake silt to a land-water ecotone plant planting medium. By adoption of the method, final planting soil is obtained by S1 sediment dredging, S2 mud-water separation, S3 silt solidifying, S4 harmless treatment and S5 planting soil formation sequentially. According to the method, firstly, a rapid mud-water separation technique is designed for low-concentration dredged mud and integrated with a subsequent silt solidifying treatment technique to form an integrated sediment dredging treatment and utilization technique to turn dredged sediment into soil; then, by a sediment microbial technique, the polluted river and lake silt is subjected to harmless treatment to meet planting soil quality control requirements, and the characteristic of rich nutrition of the river and lake sediment can be given into full play, and high-quality organic planting soil is formed.

Description

technical field [0001] The present application relates to the treatment of river and lake sludge, in particular to a method for using the treated river and lake sludge as a substrate for planting plants in the amphibious zone. Background technique [0002] The construction of my country's ecological civilization, the "Ten Measures of Water" governance action, the governance of black and odorous rivers, and the implementation of the "River Chief System" have vigorously promoted water environment governance projects. And almost all polluted rivers, lakes, and reservoirs will encounter the problem of dredging the polluted sediment. It is estimated that the annual output of dredged sludge in my country reaches 500 million m 3 above. The commonly used method in the industry is to use cutter suction or hydraulic excavation to turn the bottom mud into mud, and then pump it to the shore. After the bottom mud becomes mud, the volume increases by about 10 times, and a large amount of...

AI Technical Summary

Problems solved by technology

The commonly used method in the industry is to turn the bottom mud into mud by means of cutter suction or hydraulic excavation, and then pump it to the shore. After the bottom mud becomes mud, the volume increases by about 10 times, and a large amount of mud containing complex pollutants appears. Three major problems: "Large-scale treatment sites are required, there is no suitable outlet for follow-up, and the risk of secondary pollution caused by complex components"

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