脱氮除磷膜生物反应器处理低C/N值生活污水中试  

Membrane Bioreactor for Biological Nitrogen and Phosphorus Removal in Treatment of Low C/N Domestic Sewage

作　　者：王朝朝[1,2] 李军[1,2] 高金华[3] 常江[3] 赵晓飞[1,2] 王昌稳[1,2] 

机构地区：[1]北京工业大学建筑工程学院,北京100124 [2]北京工业大学水质科学与水环境恢复工程北京市重点实验室,北京100124 [3]北京城市排水集团有限公司,北京100176

出　　处：《中国给水排水》2010年第19期18-23,共6页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07314-008)

摘　　要：采用脱氮除磷膜生物反应器（BNPR—MBR）开展了处理北方某城市生活污水的中试研究。近200d的运行表明，对COD、BOD，的去除率分别稳定在93％、98％，其中生化降解与膜截留对去除COD的贡献率分别为88．4％和11．6％；在平均负荷为0．68kgCOD／（m3·d）的情况下，系统的污泥产率约为0．2kgVSS／kgCOD。在没有外加碳源的情况下，NH4＋-N基本上完全被硝化，对TN的平均去除率约为79％，出水平均TN保持在10．76mg／L左右；在厌氧、缺氧、好氧的交替驯化下，反硝化除磷菌和好氧聚磷菌在系统内得到了富集和强化。当系统的SRT为40d左右时，对TP的平均去除率为85％，出水TP在0．93mg／L左右，其中反硝化除磷和好氧吸磷对去除TP的贡献分别为44．63％和51．84％，膜截留所占比例为3．53％。间歇抽吸出水、在线气泡冲刷、水力反冲及定期药洗能够有效抑制膜污染，控制跨膜压差在20～30kPa之间，保证了其能够持续运行。A pilot-scale membrane bioreactor for biological nitrogen and phosphorus removal was utilized to treat the domestic sewage in a northern city. The operation for about 200 days shows that the removal rates of COD and BOD5 are 93% and 98% respectively, in which the contribution rates of bio- degradation and membrane rejection to COD removal are 88.4% and ll. 6% respectively. The sludge production is 0.2 kgVSS/kgCOD at the average loading rate of 0.68 kgCOD/（ m3 ~ d）. Without addition of carbon source, ammonia nitrogen is totally nitrified, and the average removal rate of TN is about 79%, with the effluent TN of 10.76 mg/L. During the alternate domestication under anaerobic, anoxic and aer- obic conditions, denitrifying PAOs and aerobic PAOs are enriched and enhanced. When the SRT is about 40 days, the average removal rate of TP is about 85%, with the effluent TP of 0.93 mg/L, in which the contribution rates of denitrifying PAOs, aerobic PAOs and membrane rejection to TP removal are 44.63%, 51.84% and 3.53% respectively. Intermittent suction, on-line air bubble scouring, hydraulic backwash and regular chemical wash can effectively inhibit membrane fouling and control TMP at 20 to 30 kPa, which ensures the continuous operation of MBR.

关 键 词：膜生物反应器 低C/N值 脱氮除磷 污泥产率 膜污染 

分 类 号：X703[环境科学与工程—环境工程]