石油降解优势菌的筛选和降解性能  

SCREENING AND DEGRADING BEHAVIOR OF CRUDE OIL-DEGRADING STRAINS

作　　者：孙远军[1] 聂麦茜[1] 黄廷林[1] 王蕾[1] 李立伟[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055

出　　处：《水处理技术》2007年第8期47-49,57,共4页Technology of Water Treatment

基　　金：陕西省教育厅科研计划项目自然科学专项基金(04JK157)

摘　　要：从长期污染的油田土壤中筛选分离出4株石油优势降解菌和1组原始天然组合的混合菌,并对其石油降解性能进行了初步研究。结果表明有3株菌在中性或偏碱性的pH值条件下降解效果最佳,在5d时间内石油去除率高达61.85%;无机离子对菌株的石油降解有很大影响,其中常量无机离子Mg2+,Ca2+起主要作用,微量无机离子的影响较小;混合菌株对外界不利条件(如偏酸偏碱或缺少生长元素等情况下)的承受能力明显高于纯种菌株。Four bacteria and a group of original mixed strains were isolated and screened from the soil in an oil field which had been polluted for a long time. The characteristics of their oil-degrading were also studied. The results indicated that most of the bacteria had the best degrading capability in a neutral or alkalescent condition, and the removal rate could reach to 61.85% within 5 days. Inorganic ions contributed a lot to the degrading, among which the trace element had less influence. The group of mixed strains had a better ability to endure the adverse circumstance than a pure one.

关 键 词：石油烃污染 微生物降解 混合菌株 无机离子 微量元素 

分 类 号：X703.5[环境科学与工程—环境工程]