SMP形成与降解机制分析及其对MBR膜过滤的影响

doi:10.3969/j.issn.0438-1157.2013.08.043

化工学报 ›› 2013, Vol. 64 ›› Issue (8): 3003-3008.DOI: 10.3969/j.issn.0438-1157.2013.08.043

SMP形成与降解机制分析及其对MBR膜过滤的影响

郗丽娟¹, 吕娜¹, 张海丰¹, 孙宝盛²

1. 东北电力大学化工学院, 吉林省吉林市 132012;
2. 天津大学环境科学与工程学院, 天津 300072

收稿日期:2013-01-04 修回日期:2013-05-13 出版日期:2013-08-05 发布日期:2013-08-05
通讯作者: 张海丰
作者简介:郗丽娟(1962- ),女,副教授。
基金资助:
吉林省科技发展计划项目(20120404);吉林市杰出青年基金项目(20106306);中国电机工程学会电力青年科技创新资助项目(2009)。

Analysis of formation and degradation mechanism of soluble microbial product and its effect on membrane filterability for membrane bioreactor

XI Lijuan¹, LV Na¹, ZHANG Haifeng¹, SUN Baosheng²

1. School of Chemical Engineering, Northeast Dianli University, Jilin 132012, Jilin, China;
2. School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China

Received:2013-01-04 Revised:2013-05-13 Online:2013-08-05 Published:2013-08-05
Supported by:
supported by the Scientific and Technological Planning Project of Jilin Province(20120404),City in Jilin Outstanding Youth Science Fund(20106306)and Chinese Society of Electrical Engineering for Power Technology Youth Innovation Project(2009).

摘要/Abstract

摘要： 以膜生物反应器(membrane bioreactor,MBR)中活性污泥为研究对象,考察了溶解性微生物代谢产物(soluble microbial product,SMP)的形成及降解机制,并探讨了SMP对膜过滤的影响。实验结果表明,在基质存在时反应器内的SMP主要以基质利用相关型产物(utilization associated products,UAP)为主;当基质耗尽后,生物生长相关型产物(biomass associated product,BAP)浓度增加;内源呼吸过程中BAP的产出主要来源于松散胞外聚合物(loosely bound EPS,LB)的水解;通过傅里叶变换红外光谱(FTIR)检测表明,UAP主要由多聚糖和蛋白质组成,而BAP主要是多聚糖和腐殖酸;与UAP相比,膜对BAP截留效果较好,最佳的水力停留时间(hydraulic retention time,HRT)时MBR出水同时包含UAP及BAP,BAP浓度与膜过滤阻力呈显著正相关。

关键词: 膜生物反应器, 溶解性微生物产物, 胞外聚合物, 膜过滤特性

Abstract: The formation and degradation mechanism of soluble microbial product(SMP)and the effect of SMP on membrane filterability for membrane bioreactor(MBR)were investigated.The experimental results indicated that utilization associated products(UAP)were major components of SMP when organic substrate was present.Biomass associated product(BAP)from the hydrolysis of loosely bound(LB)extracellular polymeric substances(EPS)dominated SMP when organic substrate was consumed.By Fourier transform infrared spectroscopy(FTIR),the major components of UAP were proteins and polysaccharides,but the major components of the BAP were polysaccharides and humic substances. Compared to UAP,the membrane rejection of BAP had better performance.The effluent of membrane bioreactor(MBR)contained UAP and BAP at optimal hydraulic retention time(HRT).Membrane resistance was directly related to concentration of BAP.

Key words: membrane bioreactor, soluble microbial product, extracellular polymeric substances, membrane filterability

中图分类号:

X703.3

郗丽娟, 吕娜, 张海丰, 孙宝盛. SMP形成与降解机制分析及其对MBR膜过滤的影响[J]. 化工学报, 2013, 64(8): 3003-3008.

XI Lijuan, LV Na, ZHANG Haifeng, SUN Baosheng. Analysis of formation and degradation mechanism of soluble microbial product and its effect on membrane filterability for membrane bioreactor[J]. CIESC Journal, 2013, 64(8): 3003-3008.

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SMP形成与降解机制分析及其对MBR膜过滤的影响

Analysis of formation and degradation mechanism of soluble microbial product and its effect on membrane filterability for membrane bioreactor

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