水解/接触氧化/BAF/O_3/BAC工艺处理采油废水  

Study on Treatment of Oil Extraction Wastewater by Hydrolysis/Contact Oxidation/BAF/O_3/BAC Process

作　　者：刘欣[1] 张鸿涛[2,3] 吴春旭[2] 陈兆林[3] 高磊[2] 

机构地区：[1]太原理工大学环境科学与工程学院,山西太原030024 [2]清华大学环境学院,北京100084 [3]北京国环清华环境工程设计研究院有限公司,北京100084

出　　处：《中国给水排水》2015年第1期1-4,共4页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2013ZX07209-001);"十一五"科技支撑项目(2008BAC43B03)

摘　　要：采油废水属于污染物浓度高、成分复杂、较难处理的工业废水，难以用单一的处理技术净化。采用“水解／接触氧化／BAF／O3／BAC”组合工艺对大港油田港东污水处理站的隔油池出水进行处理，当水解池的HRT为15h时，对COD的平均去除率为28．7％，且此时的可生化性改善程度最好，出水平均B／C值达到0．40，提高了37．9％；接触氧化池的最佳停留时间为7．50h，容积负荷为0．62kgCOD／（m^3·d），此时对COD的去除率达到19．3％；BAF的最佳停留时间为1．46h，容积负荷为2．55kgCOD／（m^3·d），此时对COD的去除率为20．6％；在O3／BAC工段，当O，投加量为19．5mg／L时，其发挥作用最佳。BAC单元抗冲击负荷能力较强，在负荷为1．61-2．78kgCOD／（m^3·d）条件下，其出水水质都较好；在最佳试验条件下，经该组合工艺处理后的出水水质能稳定达到《天津市污水综合排放标准》（DB12／356-2008）。Oil extraction wastewater is a kind of industrial wastewater with high concentration, complex composition and difficult degradation, which is difficult to purify with a single treatment technol- ogy. The combined process of hydrolysis, contact oxidation, BAF, O3 and BAC was used to treat the ef- fluent from the grease trap in ysis tank was 15 h, the COD Dagang Oilfield East wastewater treatment station. When the HRT of hydrol- removal rate was 28.7%, the biodegradability was improved significantly, and the average B/C ratio in the effluent reached 0.40, with an increase by 37.9%. The optimal HRT and volume load of contact oxidation tank were 7.50 h and 0.62 kgCOD/（ m^3 · d） respectively, and the COD removal rate reached 19.3%. The optimal HRT and volume load of BAF were 1.46 h and 2.55 kg- COD/（m^3 · d）, and the COD removal rate reached 20.6%. The optimal dosage of O3 in O3/BAC zone was 19.5 mg/L. The BAC unit had a strong resistance to impact load, and its excellent effluent quality was observed at load of 1.61 to 2.78 kgCOD/（ m^3 · d）. Under the optimal conditions, the effluent qual- ity of the combined process could meet the Tianjin Integrated Wastewater Discharge Standard （ DB 12/356 - 2008）.

关 键 词：采油废水 接触氧化 曝气生物滤池 臭氧 生物活性炭 

分 类 号：X741[环境科学与工程—环境工程]