环境工程学报2012，Vol.6Issue(2)：471-476,6.
钙离子对短期膜污染的影响
Impacts of calcium ion on short-term membrane fouling
摘要
Abstract
Impacts of calcium ion on membrane fouling were investigated in a flat-sheet membrane bioreactor（MBR） for domestic wastewater treatment by changing calcium concentration of influent to 30,200 and 500 mg/L.The results showed that the membrane fouling in terms of growth tendency of TMP was effectively controlled with the increase of calcium concentration,and the best permeability was achieved at calcium concentration of 200 mg/L.It was not benefit to reduce membrane fouling when the calcium concentration was much more than 200 mg/L,such as 500 mg/L.The increase of calcium ion can decrease the concentrations of SMP and LB-EPS by enhancing the bioflocculation,and reduce the external resistance due to the decrease of SMP and LB-EPS.The calcium ion can also increase the particle size of floc,and the larger floc size reduced the cake layer fouling.However,when the calcium concentration was much higher,the average size of floc would decrease due to the increase of the inorganic particle with less size,and then the membrane fouling was deteriorated because the inorganic particle would increase the internal resistance by blocking the membrane pore.关键词
膜-生物反应器/膜污染/钙离子/胞外聚合物/溶解性微生物产物Key words
membrane bioreactor/membrane fouling/calcium ion/extracellular polymeric substances/soluble microbial products分类
资源环境引用本文复制引用
陈康,王新华,李秀芬,肖小兰,谈玉琴..钙离子对短期膜污染的影响[J].环境工程学报,2012,6(2):471-476,6.基金项目
江苏省自然科学基金项目 （）
污染控制与资源化研究国家重点实验室开放课题 （）
江苏省科技支撑计划—社会发展项目 （）
