Method and system for reinforcing and repairing petroleum polluted soil by using microbial electrochemical respirator

Abstract

The invention discloses a method and a system for reinforcing and repairing petroleum polluted soil by using a microbial electrochemical respirator. The system comprises a petroleum polluted soil anaerobic reaction system, a petroleum polluted soil aerobic reaction system and a microbial electrochemical respirator system; the microbial electrochemical respirator system comprises a microbial electrochemical respirator, an anode of the respirator is arranged in the anaerobic reaction system, a cathode is arranged in the aerobic reaction system, and a biological reactor ventilation device and a biological nutrient trickling filtration device are installed in the aerobic reaction system; and the anaerobic reaction system is provided with a material and nutrient substance feeding port, a sewagedischarging port, a stirrer and a gas leading-out and activated sludge treatment device. According to the method and the system, the microbial electrochemical respirator is coupled with the anaerobicreaction system and the aerobic reaction system for repairing. Petroleum polluted soil with different water content can be repaired at the same time, petroleum hydrocarbon can be efficiently removed,the treatment period is short, the repair effect is good, secondary pollution is avoided, and continuous operation can be realized.

Description

technical field [0001] The invention relates to the technical field of remediation of polluted soil, in particular to a method and a system for strengthening remediation of petroleum-contaminated soil by a microbial electrochemical respirator. Background technique [0002] With the prosperity and development of our country's social economy, petroleum resources have been deeply utilized, thus promoting the development of petroleum exploration. However, due to management and technical defects in the utilization of petroleum, a large amount of crude oil flows directly or briefly into the soil, resulting in serious pollution of large areas of soil. The voids filled with oil not only affect the permeability of the soil, but also severely damage the three-phase structure of soil water, gas, and solid in crude oil, affecting the growth of soil microorganisms and the respiration of plant roots in the soil and the absorption of nutrients and water , causing plant root rot and necros...

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Problems solved by technology

[0006] However, there is no report on the combination of microbial electrochemical respirator with oil-contaminated soil anae

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