Method for remediating soil by using thermal desorption and microbial technology

Abstract

The invention discloses a method for remediating soil by using thermal desorption and a microbial technology. The soil is remediated by utilizing a thermal desorption soil remediating system, and the method comprises the following steps: firstly, preheating contaminated soil by adopting a preheating device, then, heating the preheated contaminated soil by adopting a heating device to separate contaminants in the soil, and finally, recovering heat of the soil from which the contaminants are separated by adopting a heat recovery device; remediating the soil by utilizing the microbial technology; applying organic fertilizer to the soil treated by thermal desorption per mu, and plowing the organic fertilizer under the soil by a rotary cultivator; then, sprinkling the soil to keep soil humidity, and then, evenly spraying microbial soil remediating inoculant; and evenly spraying the microbial soil remediating inoculant once after two months to finish soil remediation after three months. According to the method disclosed by the invention, by adopting thermal desorption and the microbial technology, a breeding condition in favor of microbial strains is created by utilizing a physical and biological method, and the soil is remediated in manner of nature, return and equilibrium.

Description

technical field [0001] The invention belongs to the technical field of soil remediation in environmental protection, and in particular relates to a method for remediating soil by using thermal analysis and microbial technology. Background technique [0002] Soil is composed of minerals formed by rock weathering, animals and plants, organic matter produced by the decomposition of microbial residues, soil organisms, water, air, and oxidized humus. Its composition ratio is roughly: air and water each account for 25%, solids account for 45%, organic matter accounts for 3% to 4%, and microorganisms account for about 1%. Once this ratio is out of balance, it is an unhealthy soil. They are interconnected and restrict each other, providing the necessary material conditions for crop growth. For the formation of soil, various soil-forming factors are equally important and mutually irreplaceable, among which microorganisms play a leading role. It can be said that soil is formed by li...

AI Technical Summary

Problems solved by technology

However, the existing thermal analysis technology for soil remediation is costly, especially when a large amount of soil needs to be heated, a large amount of heat is required