A device and method for treating oil-contaminated soil by using microorganisms

Abstract

The invention relates to a device and method for treating petroleum-contaminated soil with microorganisms. The device and method for using microorganisms to treat oil-contaminated soil include a number of oil-degradable stickers buried in oil-contaminated soil in an orderly manner at a certain distance, and a ventilation device arranged outside the oil-contaminated soil; the oil-degradable stickers include short The fiber geotextile layer and the filament geotextile layer are fixed with a petroleum-degrading solid bacterial agent layer between the short fiber geotextile layer and the filament geotextile layer through needle punching. The device and method for using microorganisms to treat petroleum-contaminated soil solves the problem that in the traditional method, when a solid petroleum-degrading bacterial agent is directly injected into the contaminated soil, the overall metabolic capacity of microorganisms will be reduced due to soil isolation. After the remediation of oil-contaminated soil is completed, due to the protection of the short-fiber geotextile layer and the filament geotextile layer, the solid oil-degrading bacterial agent layer in the middle can remain intact, which is convenient for recycling and saves treatment costs.

Description

technical field [0001] The invention relates to a device and method for treating petroleum-contaminated soil with microorganisms. Background technique [0002] During the processing, use and transportation of crude oil, it is easy to cause spillage or leakage accidents, which will cause oil to enter the soil and other environments and cause soil environmental pollution. Petroleum is a complex mixture of various hydrocarbons and a small amount of non-hydrocarbon compounds, which is difficult to degrade in the soil environment. There are mainly three types of methods to deal with oil pollution at home and abroad, physical, chemical and biological methods. Physical and chemical methods have the problems of high treatment cost and incomplete treatment, while microbial remediation methods are favored because of their advantages of economy, effectiveness and no secondary pollution. Research extensively. Most of the traditional methods of microbial treatment of oil-contaminated s...

AI Technical Summary

Problems solved by technology

There are mainly three types of methods to deal with oil pollution at home and abroad, physical, chemical and biological methods. Physical and chemical methods have the problems of high treatment cost and incomplete treatment, while microbial remediation methods are favored because of their advantages of economy, effectiveness and no secondary pollution. Extensive research

Most of the traditional methods of microbial treatment of oil-contaminated soil are based on oil-degrading bacteria screened from oil-contaminated soil, using wheat bran and peat as nutrient sources and carriers for solid-state culture, and simply mixing them to make solid-state microbial agents. Then put the solid microbial agent directly into the polluted soil roughly, and use the growth and metabolism of microorganisms to remove the pollutants. As the overall metabolic capacity declines, the amount of microbial agents has to be increased. In addition, after the remediation of oil-contaminated soil is completed, microbial agents often remain in the soil and cannot be recovered, which further increases the treatment cost.

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