Experimental Study on Indigenous Microbial Remediation of Oil-contaminated Groundwater

Using optimized indigenous microbial flora biotechnology, we had conducted repair experimental research on oil-contaminated groundwater in Puyang area of North China. The selected optimized flora include pseudomonas, micrococcus, actinomyces, fungi such as penicillium and aspergillus; in experiment process, add 1.5%'s optimized flora preparation into the polluted waters with oil content of 182.0mg / l, 862.5mg / l and 1695.0mg / l. After 28 days,37days and 37 days remediation experiments, the maximum cumulative removal rates of oil pollutants in the three concentrations are 53.46% (28d), 70.87% (37d) and 58.19% (37d). The temperature is one of the remediation affecting factors and 30℃ is the best flora growth temperature, with the most significant remediation effect on oil-contaminated groundwater; concentration is another important factor influencing oil pollutants; in sterile contrast experiment, the removal rate of oil pollutants is within 5%, indicating slow groundwater oil degradation in natural conditions.