曝气量对混凝/气提/超滤膜组合工艺膜污染的影响  

Influence of Aeration Rates on Membrane Fouling in Coagulation / Bubbling /Ultrafiltration Process

作　　者：郭灿[1,2] 何美博 李睿[1,2] 刘宇[1,3] 王帅[1,2] 刘百仓[1,2] 

机构地区：[1]四川大学建筑与环境学院,四川成都610207 [2]四川大学新能源与低碳技术研究院,四川成都610207 [3]中建五局第三建设有限公司四川分公司,四川成都610100

出　　处：《中国给水排水》2015年第19期13-15,20,共4页China Water & Wastewater

基　　金：国家自然科学基金资助项目(51278317)

摘　　要：在超滤前进行混凝预处理可以减轻膜污染,混凝/超滤组合工艺已得到广泛的认可。在混凝/超滤工艺中引入曝气,形成了混凝/气提/超滤组合水处理新工艺。通过试验分析不同曝气量条件下的跨膜压差(TMP)、膜污染总阻力(Rt)以及膜污染指数(UMFI),探讨了不同曝气量下的膜污染情况。结果表明,混凝和曝气有利于减轻膜污染;并且随着曝气量的增加,TMP和Rt增长速率呈降低的趋势,UMFI值也逐渐减小。当曝气量从零增加到180 m L/min时,TMP和Rt的平均增长速率分别从0.211 k Pa/h和0.037×1012m^(-1)/h降低至0.065 k Pa/h和0.026×1012m^(-1)/h,UMFI值从0.001 18 m^2/L降低至0.000 30 m^2/L,膜污染程度显著降低。Since coagulation pretreatment can effectively reduce membrane fouling, coagulation/ uhrafiltration process has been widely recognized. A novel combined process of coagulation, bubbling and ultrafiltration was developed by introducing aeration into the coagulation/ultrafihration process. The trans- membrane pressure （TMP）, total resistance （Rt ） and unified membrane fouling index （UMFI） under different aeration rates were analyzed through tests, and membrane fouling under different aeration rates was also discussed. The results showed that coagulation and aeration contributed to the reduction of mem- brane fouling. In addition, the increase rate of TMP and Rt slowed down and the value of UMFI decreased as aeration rate increased. When aeration rate increased from 0 to 180 mL/min, the average in- crease rate of TMP and R1 reduced from 0. 211 kPa/h and 0. 037×10^12m^-1/h to 0. 065 kPa/h and 0.026×10^12m^-1/h respectively, and UMFI value decreased from 0.001 18 m^2/L to 0.000 30 m^2/L.The reduction of membrane fouling was remarkable .

关 键 词：超滤 混凝 气提 跨膜压差 膜污染总阻力 膜污染指数 

分 类 号：TU991.2[建筑科学—市政工程]