微生物法处理海上钻井废钻井液

微生物法适用于海上钻井含油废弃物的处理。通过多次对菌株采集、分离、纯化和培养驯化,选育得到了3株对石油烃类有很好降解效果的石油类降解菌;确定了石油类降解菌适宜的生化处理条件:最佳生长及原油降解温度为50℃、最佳生长及原油降解酸碱性环境为pH=6.0、最佳菌株接种量2%、最佳原油初始浓度为500mg/L。处理后的含油废弃钻井液含油量基本稳定在2mg/L以下,降解率达98%以上。

A Microbial Approach for Waste Drilling Fluid Treatment in Offshore Drilling

Microbial approach can be used for offshore drilling oily waste treatment.Through collection,separation,purification and acclimation for strains many times,we get three strains of petroleum-degrading bacteria which have a good degradation effect on the petroleum hydrocarbons,and determine the biochemical treatment condition which is suitable for petroleum-degrading bacteria.That is: optimal growth and oil degradation temperature is 50℃,optimal growth and oil degradation acid-base environment is pH 6.0,best strain inoculation is 2%,and better crude oil initial concentration is 150 mg/L.The oil content of treated oily waste drilling fluid is below 2mg/L,and the degradation rate is more than 98%.