In-situ bioremediation method for soils polluted by nitrocompounds

Abstract

The invention provides an in-situ bioremediation method for soils polluted by nitrocompounds. The method mainly carries out in-situ remediation treatment of nitrocompounds in polluted soil through combined action of nitrocompound dominant degradation bacteria and plants with strong tolerance. The method comprises the following steps: land leveling, organic matter implantation, culture and adding of microorganisms, improvement of farming layer soil and cultivation and conservation of plants. Pollutants in soil can be degraded rapidly, leaching toxicity of soil can be lowered greatly, the soil remediation cycle is shortened, the remediation cost is low, secondary pollution cannot be generated, the method is simple and practicable, fertility of pollution place soil can be raised, and the method is suitable for in-situ remediation of pollution places with various scales. The method can be suitable for in-situ bioremediation of soils polluted by TNT waste water, DNT waste water, MNT waste water, nitrobenzene waste water, phenyl amine waste water.

Description

technical field [0001] The invention belongs to the field of contaminated soil restoration, in particular to an in-situ bioremediation method for soil contaminated by nitro compounds. Background technique [0002] The soil contaminated by nitro compounds mainly comes from the pollution of the soil near the factory area due to the leakage of trinitrotoluene (TNT) alkaline red water and mononitrotoluene (MNT) wastewater produced by military enterprises. After decades of accumulation, the area and depth of the polluted site are constantly expanding, seriously threatening the safety of local surface water quality and causing serious social problems. Contaminated soil contains high concentrations of MNT, dinitrotoluene (DNT), TNT, sodium dinitrotoluene sulfonate and other substances, which are difficult to be effectively treated by traditional methods. s concern. [0003] At present, domestic and foreign treatment methods for nitro-compound-contaminated soil include non-biologi...

AI Technical Summary

Problems solved by technology

The landfill or sea reclamation method only transfers pollutants, but fails to achieve the purpose of removing pollutants in a real sense, and the treatment cost is relatively high

Before the technology of biological treatment of nitro compound-contaminated soil was researched and applied, incineration was the only widely used treatment method, which used the characteristics of organic matter to be easily decomposed at high temperature, and incinerated to remove pollutants at high temperature, which has the ability to destroy pollutants Complete, high removal efficiency and strong automatic control, etc., but due to the harsh incineration conditions, the cost is high, and the method has the risk of explosion, and the gas produced by combustion such as NO 2 It will pollute the atmosphere and it is difficult to deal with polluted soil on a large scale

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