微生物-电催化氧化组合工艺处理油田采出水  

Treatment of Oilfield Produced Water by Microbial/Electrocatalytic Oxidation Combined Process

作　　者：张宏奇 

机构地区：[1]大庆油田采油三厂,163414 [2]东北石油大学,黑龙江大庆163318

出　　处：《水处理技术》2018年第1期107-109,113,共4页Technology of Water Treatment

基　　金：国家自然科学基金资助项目(51404068);国家自然基金重点资助项目(51534004)

摘　　要：将微生物接触氧化及电催化氧化组合工艺用于含油污水处理,首先利用接触氧化去除大部分的油等可降解有机污染物;再采用曝气生物滤池进一步去除污水中的有机污染物和悬浮物;污水中剩余的难降解污染物则采用电催化氧化工艺最终去除。接触氧化/电催化组合工艺能够很好地发挥微生物和化学降解两种技术各自的优势。在大庆油田进行了240 m^3/d的现场实验,设计了"接触氧化+曝气生物滤池+电催化氧化"三步法处理工艺。经过两个月的连续运行,处理后污水中的油质量浓度低至0.2 mg/L,SS质量浓度降至2.3 mg/L,COD降至38.1 mg/L。水质可同时满足回注和外排的需求。该工艺较处理效率高,水力停留时间短,可以相应减小处理构筑物和节省占地及建设投资。Microbial contact oxidation and catalytic process was used for oily wastewater treatment, most of the oil and suspended solids was removed by contact oxidation; organic matter and suspended solids was further removed by biological aerated filter; and fitrther removal of pollutants and ammonia residue was achieved by electrolysis. The combination process of contact oxidation/electro-catalysis could exert the advantages of two kinds of technologies, which were microbial and chemical degradation. In the field test of 240 m3/d, the three step treatment process of＇contact oxidation＋ aeration biological filter ＋ electrolysis＇ was designed. After three months of operation, the effluent oil content, suspended solids content and COD content was 0.2 mg/L, 2.3 mg/L and 38.1 mg/L respectively. The effluent quality could meet the reinjection and effiux requirement. The process had high efficiency and short hydraulic retention time, and it could reduce the processing structures and save the land and construction investment accordingly.

关 键 词：采油污水处理 生物降解 电化学 

分 类 号：TQ031.7[化学工程] X741[环境科学与工程—环境工程]