摘要
从膜污染物分析、微生物代谢产物EPS、SMP对膜污染的影响等方面,对两级序批式反应器运行模式下的平板膜污染机理进行了试验研究.结果表明,膜表面及膜孔内部存在以球菌、杆菌为主的生物污染,膜表面的无机污染物主要是Fe、Na、Zr、Rb、Ca等化合物在浓差极化的作用下超过其溶解度极限后结晶形成的盐垢,膜表面的有机污染物主要是蛋白质,是形成膜表面凝胶层的主要原因,而蛋白质在膜面为伴随有电子转移的化学吸附,从而引起膜通量严重下降.
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.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2010年第2期186-191,共6页
China Environmental Science
基金
上海市重点学科资助项目(B604)
关键词
两级序批式MBR
膜污染物
EPS
SMP
蛋白质
two-stage sequencing batch MBR
membrane fouling
extracellular polymeric substances（EPS）
soluble microbial products（SMP）
protein
