膜生物反应器处理工业废水中膜污染及膜过滤特性研究  

Mechanism of Membrane Fouling and Filtration Characteristics in a Membrane Bioreactor for Industrial Wastewater Treatment

作　　者：范举红 余素林 张培帅[1,2] 兰亚琼 刘锐 陈吕军[1,3] 

机构地区：[1]浙江清华长三角研究院生态环境研究所,浙江省水质科学与技术重点实验室,嘉兴314006 [2]中国科学院上海硅酸盐研究所,上海200050 [3]清华大学环境学院,北京100084

出　　处：《环境科学》2013年第3期950-954,共5页Environmental Science

基　　金：国家自然科学青年科学基金项目(51108422);浙江省公益技术研究社会发展项目(2011C23064);嘉兴市科技计划项目(2010AZ1034)

摘　　要：采用膜生物反应器(MBR)中试试验装置处理制革、印染工业园区混合废水,考察了悬浮污泥浓度(MLSS)、溶解性微生物产物(SMP)和松散型胞外聚合物(EPS)表征总量、胶体粒子等因素对膜污染发生的影响程度.结果表明,试验装置启动后的120 d内,发生轻度膜污染现象,过滤膜阻力R20从1.5×1012m-1增加至1.8×1012m-1.MBR池内胶体粒子浓度与膜过滤阻力变化呈现明显的线性相关,而MLSS、SMP和EPS表征总量等因素的变化与膜过滤阻力的变化不存在相关性.分析认为胶体粒子是引起该试验装置发生膜污染现象的主要因素,其成因可能是胶体粒子通过附着在膜表面,沉积堵塞膜孔,从而造成膜污染.The influence of mixed liquor suspended solids （MLSS）, soluble microbial product （SMP）, extracellular polymeric substance （EPS） , colloidal particles and other factors contributed to membrane fouling was analyzed in this pilot test by membrane bioreactor （MBR） process for the leather printing and dyeing industrial park mixed wastewater treatment. The results showed that slight membrane fouling occurred after 120-day experiment with an observable increase in membrane resistance R20 from 1.5 ×10^12m^-1 to 1.8 ×10^12m^-1. Also, a linear correlation was found between the proportion of colloidal particles concentration in TOC of MBR former solution and membrane filtration resistance change. However, the change of MLSS, SMP, EPS and other factors was not correlated with the membrane filtration resistance change. Therefore, the colloidal particle was considered to be the main factor causing membrane fouling, which attached to the membrane surface and deposited to block the membrane pore.

关 键 词：膜生物反应器 印染废水 膜污染 膜过滤阻力 胶体粒子 

分 类 号：X703.1[环境科学与工程—环境工程]