摘要
为强化油田污水的生化处理效果,从胜利油田采出液中筛选出3株高温烃降解菌,分别编号为JQ-1、JQ-2、JQ-3,初步鉴定JQ-1、JQ-2为芽孢杆菌属,JQ-3为不动杆菌属,其原油降解率分别为48%、55%、46%。将3株菌混合,其对原油的降解效果好于单株菌,其降解率可达到70%以上,混合菌降解原油的适宜条件分别是温度为45～55℃、pH值为5.5～6.5、矿化度12000～18000mg/L。在室内模拟现场条件进行污水生化处理试验,结果表明:含油量为40mg/L左右的油田污水经过8h处理后含油量在2mg/L以下,同时能有效的抑制硫酸盐还原菌的生长。该混合菌在一定程度上提高了含油污水生化处理的可行性,为油田污水治理提供了理论基础。
In order to improve the biochemical treating effect of oilfield produced water,three bacteria strains,JQ-1,JQ-2,JQ-3,are isolated from produced fluids in Shengli oilfield,Which oil degrading rate are up to 48%,55% and 46% respectively.Strains JQ-1,JQ-2 are identified as Bacillus sp,JQ-3 as Acinetobacter sp.Comparing with single bacterium,mixed three bacteria strains have better degradation ability,whose degrading rate of crude oil is up to 70%,the best degradation conditions of mixed bacteria are:temperature 45~55 ℃,pH 6.5~7.0,mineralized rate 12 000~18 000 mg/L.The bench scale laboratory biochemical test simulating field conditions show that after 8 hours,the oil content of oilfield produced water is reduced from 40 mg/L average to less than 2 mg/L,at the same time,sulfate reducing bacteria(SRB)is restrained effectively.Continuous biochemical treatment with hydrocarbon degradation bacteria is improved.
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2007年第4期110-113,共4页
Journal of Southwest Petroleum University(Science & Technology Edition)
基金
国家自然科学基金(50604013)
国家"十五"科技攻关项目(2003BA613A-8)
关键词
烃降解菌
高温
筛选
回注污水
生化处理
胜利油田
hydrocarbon degradation bacteria
high-temperature
screening
reinjected produced water
biochemical treatment
ShengLi oilfield
