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）.
出处
《中国给水排水》
CAS
CSCD
北大核心
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)
关键词
采油废水
接触氧化
曝气生物滤池
臭氧
生物活性炭
oil extraction wastewater
contact oxidation
biological aerated filter （BAF）
O03
biological activated carbon （BAC）
