Kinetics on strain HJ-1 degrading petroleum

Key words:  strain HJ-1  aerobic fermentation  oily sludge  kinetics

Abstract:

A bacterium HJ-1 was isolated from petroleum contaminated soil by enrichment using petroleum as sole source of carbon and identified as Bacillus. The aerobic fermentation experiment was carried out through throwing the fermentation fluid of HJ-1 into self-made aerobic fermentation treatment device in the condition of ventilation of 0.2 m³ ? h 1, adding sawdust and straw as raising agent, swab as nitrogen source, pH of 7 一 8，water-cut of 68.51% , bacterium HJ-1 as bacterium source with the content of 4. 4% . The experimental results show that the oil-cut rate of oily sludge declined from 18.77% to 8. 87% and the degradation rate of oil could reach 52.7% through 24 days1 aerobic fermentation experiment. The degradation of petroleum may be expressed using first-order kinetic model.