在线超声对膜生物反应器膜污染的控制  

On-line ultrasound on fouling control of membrane bioreactor

作　　者：刘昕[1,2] 陈福泰[2] 黄霞[2] 朱书全[1] 

机构地区：[1]中国矿业大学(北京)化学与环境学院,北京100083 [2]清华大学环境科学与工程系,环境模拟与污染控制国家重点联合实验室,北京100084

出　　处：《中国环境科学》2008年第6期517-521,共5页China Environmental Science

基　　金：国家杰出青年基金资助项目(50725827)

摘　　要：构建在线超声-膜生物反应器(US-MBR),利用间歇超声辐照控制膜污染.结合跨膜压差的上升和污染膜表面微观形态的变化,在不同超声间隔时间条件下对US-MBR中膜污染过程进行了分析.结果表明,超声时间2min和膜通量12.0L/(h?m2)时,在超声间隔时间分别为8,12,16h的条件下,US-MBR的运行周期比未施加超声的普通膜生物反应器(Control-MBR)分别延长17,13,5d左右,在线超声有效抑制了由上清液有机物导致的凝胶层污染.膜表面污染层阻力分布显示,超声可降低凝胶层阻力.场发射扫描电镜-能谱分析仪分析表明,超声通过减少有机物附着而延长膜运行时间.2套反应器出水水质基本没有差别,超声未造成出水水质的恶化.A novel on-line ultrasound assisted membrane bioreactor （US-MBR） was proposed to control membrane pollution. The changes of trans-membrane pressure and fouled membrane surface under the condition of different ultrasound interval time in US-MBR were analyzed. At ultrasound time 2min and membrane flux 12.0L/（h·m^2）, under the condition that ultrasound interval times were 8, 12 and 16h respectively, the operation period of US-MBR was prolonged about 17, 13 and 5d respectively compared with common membrane bioreactor of not adding ultrasound. On-line ultrasound effectively controlled the gel layer fouling induced from organic matters in the supernatant liquor and thus reduced the gel layer resistance. SEM-EDS was applied to analyze the membrane fouling, also revealing that ultrasonic irradiation could effectively reduce adhesion of organic matters on the membrane surface. Through comparative test using US-MBR and control-MBR, it was demonstrated that the effluent quality was not deteriorated by on-line ultrasonic irradiation.

关 键 词：膜生物反应器 在线超声 膜污染 凝胶层 

分 类 号：X703[环境科学与工程—环境工程]