Abstract: This study was aiming at investigating the effects of ozonation-activated carbon technology on membrane fouling mitigation in membrane bioreactor (MBR). The results from the short-term experiment showed that power activated carbon (PAC) would improve the efficiency of ozone. When the ozone dosage was more than 0.25 mg/(gSS)，the filterability of mixed liquor would deteriorate. Analysis of residual ozone in the effluent indicated that PAC would benefit to maintain the constant ozone concentration in the bulk solution. The introduction of ozonation-activated carbon technology into the MBR system would be beneficial to the system because membrane fouling could be controlled in long-term experiment. The microbial activity was somewhat inhibited，however，the effluent quality of the system was affected at a minimal level. Ozonation-activated carbon could reduce the protein and carbohydrate fractions in the soluble microbial products (SMP). The amount of loosely bound extracellular polymeric substances (LB) and the protein fractions in extracellular polymeric substances (EPS) were also decreased obviously by ozonation-activated carbon technology. These findings indicated the feasibility of using ozonation-activated carbon technology to control MBR membrane fouling.

Key words: membrane bioreactor (MBR), membrane fouling, soluble microbial products (SMP), extracellular polymeric substances (EPS), ozonation-activated carbon

摘要： 本研究目的是探讨臭氧-活性炭技术对膜生物反应器（membrane bioreactor，MBR）膜污染减缓的影响。通过短期批式实验表明，粉末活性炭（power activated carbon，PAC）可强化臭氧的氧化效果，臭氧投加量超过0.25mg/(gSS)将恶化污泥混合液可滤性；对滤出液残余臭氧浓度检测表明，PAC的加入有利于维持本体溶液臭氧浓度。臭氧-活性炭技术引入MBR系统有助于膜污染的减缓，反应器内微生物活性受到一定的抑制作用，但对MBR出水水质影响较小；臭氧-活性炭减小了反应器内溶解性微生物产物（soluble microbial products，SMP）中的蛋白质及多聚糖含量，显著降低了污泥絮体中松散的胞外聚合物（loosely bound EPS，LB）及胞外聚合物（extracellular polymeric substances，EPS）中蛋白质浓度，以上结果表明应用臭氧-活性炭技术来延缓MBR膜污染是可行的。

关键词: 膜生物反应器, 膜污染, 溶解性微生物代谢产物, 胞外聚合物, 臭氧-活性炭