Screening on Oil-degrading Microorganisms and the Preliminary Research on Factors Affecting the Degradation

An effective oil-decomposing bacterial strain S_(16)was obtained by screening after two months' domesticating,using bean oil as the sole carbon source,and strain identification proved that strain S_(16) belonged to Baccillus subtilis.The factors affecting the degradation were studied.The results showed that the strain could quickly grow under the condition that the intial oil concentration was 400 mg/L,the intial pH was 7.0,the agitation was 200 r/min,and temperature was 40 ℃.The degrading rate on bean oil reached 73.5% after fermentation.