中文摘要：

四微生物紧张从沿海的弄脏石油的土壤和 Bohai 海油矿的沙样品被孤立；他们被发现降级海洋油有效地掉下。有这四的原油的降级效率拉紧的试验性的结果表演(XT-4， SZ-1-25， B-4-9， BS-3-12 ) 分别地，处于他们的最佳条件是 95.97% ， 96.01% ， 97.99% 和 98.99% 。细菌的 biodegradation 的特征被调查。与 5,664mg/kg-dry-sand 的一个起始的油内容，污染油的沙滩沙的模拟 biotreatment 证明剩余油内容在 170 白天有二个细菌的处理以后是 2,700 mg/kg-dry-sand 和 2,679 mg/kg-dry-sand (B-4-9， BS-3-12 ) 分别地。

英文摘要：

Four microorganism strains were isolated from coastal petroleum-polluted soil and sand samples of Bohai Sea oilfield; they were found to degrade marine oil spills effectively. The experimental results show that the degradation efficiency of crude oil with these four strains （XT-4, SZ-1-25, B-4-9, BS-3-12） is 95.97%, 96.01%, 97.99% and 98.99%, respectively, in their optimum conditions. The characteristics of bacterial biodegradation are investigated. The simulation biotreatment of oil-contaminated beach sand, with an initial oil content of 5,664mg/kg-dry-sand, shows that the residual oil content is 2,700 mg/kg-dry-sand and 2,679 mg/kg-dry-sand after 170 days＇ treatment with two bacteria （B-4-9, BS-3- 12）, respectively.