Division of Environmental Science and Engineering, National University of Singapore, 9 Engineering Drive 1, EA-03-12, Singapore 117576, Singapore.
Water Res. 2010 Apr;44(7):2336-48. doi: 10.1016/j.watres.2009.12.038. Epub 2010 Jan 6.
The initial fouling characteristics of aerobic submerged membrane bioreactors (MBRs) were analysed under different flux conditions. Physico-chemical analyses of the mixed liquor hinted that carbohydrates were more important to membrane fouling than proteins. However, this contrasted with the characterisation of foulants on the membrane surfaces. Micro-structural analyses of the foulants on the membrane surfaces showed that the dominant foulants were different under different flux conditions. Membrane fouling occurred through a biofilm-dominated process under lower flux conditions, but the mechanism shifted towards a non-biofilm, organic fouling process as the flux was increased. In spite of the differences in fouling mechanisms, it was found that the protein fraction on the membrane surfaces, in the initial stages of MBR operations, had the greatest impact in the rise of transmembrane pressure.
分析了不同通量条件下好氧浸没式膜生物反应器（MBR）的初始污染特性。混合液的物理化学分析表明，碳水化合物对膜污染的重要性高于蛋白质。然而，这与膜表面污染物的特征形成了对比。膜表面污染物的微观结构分析表明，在不同通量条件下，主要污染物是不同的。在较低通量条件下，膜污染是通过生物膜占主导的过程发生的，但随着通量的增加，机制向非生物膜、有机污染过程转变。尽管污染机制存在差异，但在 MBR 运行的初始阶段，发现膜表面的蛋白质部分对跨膜压力的上升影响最大。
