膨胀与非膨胀状态下MBR的膜通量比较研究  

Comparison of Membrane Fluxes of MBRs with Filamentous Sludge Bulking and Non-filamentous Sludge Bulking

作　　者：王文标[1] 陈志莉[1,2] 何强[2] 刘鸿霞[2] 田陆梅[3] 吴志超[3] 顾国维[3] 

机构地区：[1]后勤工程学院环境工程系,重庆400016 [2]重庆大学城市建设与环境工程学院,重庆400045 [3]同济大学环境科学与工程学院,上海200092

出　　处：《中国给水排水》2012年第11期90-93,共4页China Water & Wastewater

摘　　要：对污泥膨胀状态与非膨胀状态下MBR的膜通量进行了比较。结果表明,在相同的工况下,非膨胀状态MBR的膜通量下降速度比膨胀状态MBR的要快得多,原因可能是前者的膜面滤饼颗粒粒径减小得更快。而膜面滤饼粒径减小得较快的原因可能是由于其颗粒比较接近于球体,较大颗粒在剪切作用下容易重新进入主体溶液;膨胀状态MBR的膜面滤饼粒径减小得较慢,可能是由于丝状体互相缠绕,不易被分离,较大的颗粒不容易回到主体溶液中。滤饼粒径的逐步减小是由膜通量下降造成的,这一点可由临界粒径与膜通量的关系式及临界通量理论得到解释。The membrane fluxes of MBRs with filamentous sludge bulking and non-filamentous sludge bulking were compared. Under the same operating mode, the flux of MBR with non-filamentous sludge bulking decreased much faster than that of MBR with filamentous sludge bulking. The particle size of cake on membrane surface in the former decreased more quickly. These particles were nearly spherical in shape, and large particles dispersed easily in the liquid under shear force. The particle size of cake on membrane surface in the latter, decreased more slowly. The reason could be that filaments were bound to- gether, hardly separated, and large particles dispersed hardly in the liquid. The decrease of cake particle size was caused by a flux decline, which could be interpreted by the relation between critical size and flux as well as critical flux theory.

关 键 词：膜生物反应器 污泥膨胀 通量 粒径 

分 类 号：X703[环境科学与工程—环境工程]