Study On Bio-electrochemical Degradation Of Crude Oil In Soil

At present,China’s oil consumption increased every year,from oil production to use,each link will cause varying degrees of pollution.Oil pollution is easy to accumulate in the soil and does not readily degraded in soil contamination,easily affecting other environmental threat to human health.Bioremediation technology has many advantages such as low cost,good effect,small secondary pollution,etc.,which can be used for oil pollution,but the result shows that it is still not a satisfactory repair technique in practical applications.Electrochemical and biological combine can compensate for the limitations of biological technique.For this project,we were to strengthen the biological and biological stimulation of the limitations of using microbes-electric force and microbial fuel cell method on oil degradation of soil pollution.Microbes-electric force method examines the electrode for oil degradation bacteria and oil pollutants under non-uniform electric field of two-dimensional migration/degradation effects;microbial fuel cell anode material is investigated,operation time,inoculum,diaphragm and cathode oxygen forms such as the effects of the factors on the degradation of crude oil in the soil optimized conditions,the MFC and the electric power law and soil coupling effect on MFC to produce electricity and the ability of oil degradation.The test results show that the degradation effect of petroleum hydrocarbons of microbes-electric power method in the non-uniform electric field is the best,after 10 days’ running,the degradation rate was 10.44%,while the number of test group(uniform electric field)was 8.37%.The rate of using carbon rod for the anode degradation rate is 1.23 times more than carbon paper as the anode after 60-day running,which the petroleum hydrocarbon degradation rate was 7.89%;degradation of petroleum hydrocarbons with liquid cathode,anaerobic sludgewas and proton exchange membrane higher than other.on this basis,with additional electric method of continuous manner to the cathode input oxygen content of oxygen as an electron acceptor becomes high,effectively improve the soil MFC’s electricity production capacity,the output voltage reached 334.2 mV,petroleum hydrocarbon degradation rates by 1.1 times.The difficulty of this approach is the controlling for pH value in the reactor,however,the increased degradation rate of petroleum hydrocarbons is significantly contributing to the MFC on soil environment applications.