Abstract：The fouling mechanism of flat-sheet membrane on the mode of two-stage sequence batch operation has been investigated by analysis of surface contaminants and extracellular polymeric substances (EPS) and soluble microbial products (SMP) in the sludge. The influences of microorganism metabolism products including EPS and SMP on the membrane fouling were discussed. It was found that the membrane surfaces and inner pores were mainly fouled by spherical and rod-shaped bacteria. Examinations by SEM/EDS revealed that the inorganic contaminants on the membrane surface were composed of Fe、Na、Zr、Rb、Ca, S, C ,P and O. These crystallized salts (sulfates or carbonates) settled onto the membrane surface when the supersaturated solution formed due to polarization effects. The main organic contaminant on the membrane surface was found to be protein. The formation of gel layer due to chemical absorption of protein on the membrane surface resulted in trans-membrane flux reduction significantly.
元新艳, 沈恒根, 王琳, 孙磊, 李世峰. 两级序批式反应器运行模式下平板膜污染机理研究[J]. 中国环境科学, 2010, 30(2): 186-191.
YUAN Xin-Yan, SHEN Heng-Gen, WANG Lin, SUN Lei, LI Shi-Feng. Fouling mechanism of flat-sheet membrane on the mode of two-stage sequence batch operation. CHINA ENVIRONMENTAL SCIENCECE, 2010, 30(2): 186-191.
