Selection of a high effective oil-degrading strain and study on their degrading characteristics

In order to screen high-effective oil-degrading strains, seven oil-degrading strains were isolated from the sludge of school restaurant wastewater trench. Taking the sesame oil as only the carbon source, a high effective oil-degrading dominant bacteria was determined by initial and the duplicate selection. The results of the strain characteristics indicated that this strain was the aerobe bac- teria, and the most suitable temperature and pH value for sesame oil degradation was 30~37 ℃ and 8.0 respectively. Under the best habitat, the degeneration rate of oil in 72 hours was above 80% while oil-degrading strain was cultured in an inorganic medium in which the mass concentration of the sesame oil was 20 g·L-1.