关键词: 生物处理, 回转悬浮生物床, 油气田采出水, 集成装置

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.