基于污泥性质探究微电场对MBR膜污染的影响  

Exploring influence of micro-electric field on MBR membrane fouling based on properties of sludge

作　　者：刘晓宇 张蓉 张超 何盼 卢静 侯彬 麦翠蓥 LIU Xiao-yu;ZHANG Rong;ZHANG Chao;HE Pan;LU Jing;HOU Bin;MAI Cui-ying(School of Environment and Safety Engineering,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学环境与安全工程学院,山西太原030051

出　　处：《现代化工》2022年第2期126-130,共5页Modern Chemical Industry

基　　金：国家自然科学基金项目(21806147);国家自然科学基金项目(41977141);山西省自然科学基金项目(201801D121268)。

摘　　要：采用微生物燃料电池-膜生物反应器系统(MFC-MBR)对微电场作用下污泥性质进行分析。对MFC-MBR的产电性能和优化分析发现,在水力停留时间为36 h、曝气量为1.5 L/min的工况条件下,该系统在稳定输出电能的同时能够高效降解苯酚废水。MFC-MBR和C-MBR(空白对照膜生物反应器系统)在最佳工况条件下的长期运行结果表明,微电场的施加使得膜污染得到缓解。与C-MBR相比,MFC-MBR膜污染的缓解归因于污泥性质的改变,主要体现在Zeta电位绝对值降低、污泥平均粒径变大、SMP和LB-EPS质量分数降低。因此,在最佳运行条件下,通过对MBR施加微电场既能促进苯酚废水的降解,又能改变污泥性质、缓解膜污染。Microbial fuel cell-membrane bioreactor system(MFC-MBR)is utilized to analyze the properties of sludge under the action of micro electric field,so as to explain the reasons for the mitigation of membrane fouling.It is found through analyzing the power generation performance and optimization of MFC-MBR that the system can efficiently degrade phenol wastewater while generates electricity stably under the working conditions that hydraulic retention time is 36 h and aeration rate is 1.5 L·min^(-1),which are the optimal operation conditions for the MFC-MBR.The long-term operation results of MFC-MBR and C-MBR(a blank control membrane bioreactor system)under optimal working conditions show that the application of micro-electric field makes the membrane fouling alleviate.Compared with C-MBR,the alleviation of MFC-MBR membrane fouling is attributed to the change of sludge properties,which is mainly reflected in the decrease of the absolute value of zeta potential,the increase of average particle size of the sludge,and the decrease of SMP and LB-EPS contents.In summary,under optimal operating conditions,applying a micro-electric field to MBR can not only promote the degradation of phenol wastewater,but also change the properties of sludge,thereby alleviating membrane fouling.

关 键 词：微生物燃料电场 膜生物反应器 微电场 膜污染 污泥性质 

分 类 号：X703[环境科学与工程—环境工程]