Experimental research on microbial remediation of oil-contaminated groundwater

Use optimized indigenous microbial flora biotechnology to conduct repair experimental research on oil contaminated groundwater in loess area of north Shaanxi. The selected optimized flora include Pseudomonas, Micrococcus, Actinomayces, Penicillium, Aspergillus. During experiment process, add 1.5%´s optimized flora preparation into the polluted waters with oil content of 182.0mg/862.5mg/1 and 1695.0 mg/1. After some 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); temperature is one of the remediation affecting factors and 30°C 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 speed in natural conditions.