Abstract: In view of the characteristics of the produced water in the Xinjiang oil and gas fields, on the basis of the previous screening of the dominant bacterial-spawn (culture), the produced water from the Shixi oilfield and from the Kelameili gasfield is treated with the integrated biological treatment equipment based on “rotary suspended bio-bed technology”. The results show that the treatment effect is obvious. In the treatment of produced water from Shixi oilfield, the device with designed processing capacity of 1m3 / h can treat at most 4m3 / h of the water during the actual operation. If the influent COD were less than 300mg/ L, the effluent COD would be generally stabilized at 20-60mg/ L. The removal rate of COD was generally above 58%-80%. The mass concentration of volatile phenol and petroleum was 0-0. 29mg/ L and 0. 2-1. 4mg/ L respectively. The residence time of sewage was shortened to 4-5hrs. In the treatment of produced water from Kelameili gasfield, if the influent COD were between 1226mg/ L and 1904mg/ L, the effluent COD was less than 120mg/ L. The oil content, suspended matters and volatile phenol of the effluent could reach 5. 3-6. 2mg/ L, 8-13mg/ L and around 0. 1mg/ L respectively. They meet the Class-II criteria of the “Integrated Wastewater Discharge Standards” (GB8978-1996). All of these indicate that the rotary suspended bio-bed technology and its integrated devices have good adaptability to the produced water of oil/ gas fields and good effect of treatment.

摘要： 针对新疆油气田采出水特性, 在前期筛选优势菌种的基础上, 用基于“回转悬浮生物床技术” 的生物处 理一体化集成装置处理石西油田采出水和克拉美丽气田采出水, 结果表明处理效果明显。其中处理石西油田采出水时, 设计处理量为1m3 / h 的装置, 实际运行时最大可处理水量为4m3 / h, 进水COD 小于300mg/ L 时, 出水一般稳定在20~ 60mg/ L, COD 去除率一般在58%~80%以上; 出水挥发酚、石油类质量浓度分别为0~0. 29mg/ L、0. 2~1. 4mg/ L, 污水 停留时间可缩短至4~5h。处理克拉美丽气田采出水时, 进水COD 在1226~1904mg/ L 之间时, 出水在120mg/ L 以内, 出水含油量、悬浮物和挥发酚分别可达5. 3~6. 2mg/ L、8~13mg/ L 和0. 1mg/ L 左右, 达到GB8978—1996 《污水综合排 放标准》中的二级标准, 表明回转悬浮生物床技术及其一体化集成装置对油气田采出水有很好的适应性和处理效果。

关键词: 生物处理, 回转悬浮生物床, 油气田采出水, 集成装置