MBR/PAC工艺处理微污染源水的膜污染机理及控制  

Membrane Fouling Mechanisms and Control in MBR/PAC Process for Treatment of Micro-polluted Source Water

作　　者：程家迪 刘锐 李荧 陈吕军[1,3] 

机构地区：[1]浙江清华长三角研究院生态环境研究所,浙江嘉兴314006 [2]浙江双益环保科技发展有限公司,浙江嘉兴314006 [3]清华大学环境科学与工程系,北京100084

出　　处：《中国给水排水》2010年第19期41-44,共4页China Water & Wastewater

基　　金：浙江省重大专项项目--适用于农村饮用水的管式微滤膜技术开发与应用(2006C13107);南湖区大院名校成果产业化专项资金资助项目

摘　　要：采用膜生物反应器（MBR）与粉末活性炭（PAC）的组合工艺（MBR／PAC）处理微污染源水，考察了膜污染的机理与特征，探讨了控制膜污染的措施。结果表明：MBR／PAC工艺处理微污染源水时的膜污染发展速度较快；膜污染以滤饼层沉积和有机物膜孔污染为主，同时伴随着少量的无机物污染；膜固有阻力、滤饼层阻力、凝胶层与膜孔堵塞阻力分别占膜总阻力的15％、43％和42％。只用清水冲洗膜表面可使膜过滤性能恢复35．7％～38．5％；而用0．3％～0．5％的NaCIO浸泡足够时间后，膜过滤性能基本得到恢复；在碱洗后增加稀酸清洗，可进一步提高清洗效果。The combined process of membrane bioreactor （MBR） and powered activated carbon （PAC） was used to treat micro-polluted source water. The mechanism and characteristics of membrane fouling were investigated, and the measures for controlling membrane fouling were studied. The results show that the development of membrane fouling is fast when treating micro-polluted source water by the combined process. The membrane fouling mostly attributes to the cake layer over the membrane surface and organic pollutants blocking in the pores, and pollution of inorganic pollutants is also accompanied. The inherent resistance from the clean membrane, the cake layer, the get layer and the pore blocking re- spectively account for 15%, 43% and 42% of the total resistance. 35.7% to 38.5% of membrane per- meability can be recovered by cleaning the membrane surface with fresh water, and the membrane perme- ability is basically recovered by soaking in 0.3% to 0.5% of NaC10 solution for sufficient time, and the cleaning effect can be further improved by diluted acid washing.

关 键 词：MBR/PAC组合工艺 微污染源水 膜污染 膜清洗 

分 类 号：TU991.2[建筑科学—市政工程]