石油降解菌株的分离及其降解特性研究

从广州石化厂污水中分离到一株能降解石油的细菌，并对该菌的降解特性进行了研究。结果表明，该菌在原油培养基中培养3d能降解61．17％的原油，培养13d原油的降解率达88．71％；在pH7．0左右生长最好，除油率达到88．66％；接种量、菌龄对菌的除油率有较大影响；氮磷营养盐的影响非常显著，而水体盐度对除油率影响不大，在加入补充氮磷盐的淡水和海水中除油率均在70％以上。该菌能以石蜡为碳源生长，而不能利用芳烃。

Isolation and Degrading Characteristics of Crude Oil-degrading Microorganism

A bacterial strain has been isolated from oil refin ery wastewater and the characteristics of oil degrada tion was also studied. The experimental results indi cated that the strain could degrade 61.17% crude oil after incubating in a medium containing crude oil as carbon source for three days, and degrade 88.71% after thirteen days. The strain could grow best under pH 7.0, and degrade 88.66% crude oil. Quantity of inocu lation and microorganism age have greater effect on oil degradation. Nitrogen and phosphorus nutrition af fected degradation obviously, but salinity have no cf feet on degradation. The rate of oil degradation were over 70% under fresh and sea water. The strain could live in paraffin, but could not use aromatic compound.