膜基材对DMBR运行过程及污水处理性能的影响  

Effect of Membrane Support Material on Operation and Sewage Treatment Performance of DMBR

作　　者：孙琪媛 胡以松[1] 王晓昌[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055

出　　处：《中国给水排水》2016年第13期21-25,共5页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2014ZX07315002);国家自然科学基金资助项目(51508450);中国博士后科学基金资助项目(2015M582760XB);陕西省污水处理与资源化科技创新团队项目(2013KCT-13)

摘　　要：构建了以200目的不锈钢网、尼龙网和尼龙网附加支撑材料(1 cm孔径的钢丝网)为膜基材的三种不同动态膜组件,并应用于动态膜生物反应器(DMBR)中处理城市生活污水。通过观察通量和浊度的变化情况,考察了不同膜组件长期运行时的过滤性能,比较了不同清洗方式对动态膜再生效果的影响。结果表明,三种反应器中动态膜的形成时间均较短,浊度均能在短时间内(<20 min)降至1 NTU以下,物理清洗后动态膜的再生效果稳定,其中尼龙网附加钢丝网后具有更高的稳定通量[80~105 L/(m^2·h)]及持续运行时间(3 d)。不同膜组件对污染物的去除效果相当,对COD的平均去除率均大于87%,对NH_4^+-N的去除率均大于97%。Three dynamic membrane （DM） modules were developed using different support mate- rials （stainless steel mesh, nylon mesh and nylon mesh plus stainless steel mesh）. Then they were ap- plied to the dynamic membrane bioreactor （DMBR） for municipal sewage treatment. By detecting the variations of membrane flux and effluent turbidity, the filterability of different modules was investigated during long-term operation, and the effect of different physical cleaning methods on regeneration efficien- cies of DM was compared. It was found that the DM could be formed quickly as the effluent turbidity de- creased to below 1 NTU within 20 min for the three different modules, and also physical cleaning was ef- fective in DM regeneration. The module made of nylon mesh plus stainless steel mesh showed the highest stable flux of 80 to 105 L/（ m2 · h） and continuous operation time of 3 d. However, the treatment per- formance of different modules was quite similar, with the removal rates of COD and ammonia higher than 87% and 97% , respectively.

关 键 词：动态膜生物反应器 膜基材 城市生活污水 运行过程 膜通量 

分 类 号：X703[环境科学与工程—环境工程]