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

XI Lijuan; LV Na; ZHANG Haifeng; SUN Baosheng

doi:10.3969/j.issn.0438-1157.2013.08.043

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

更新时间：2025-12-10

- Analysis of formation and degradation mechanism of soluble microbial product and its effect on membrane filterability for membrane bioreactor
- CIESC Journal Issue 8, Pages: 3003-3008(2013)
- 作者机构：
  
  1. 东北电力大学化工学院,吉林市,吉林省,132012
  2. 天津大学环境科学与工程学院,天津,300072
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2013.08.043
  CLC： 703.3
- Online First：05 August 2013，
  
  Published：05 August 2013
- 稿件说明：
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XI Lijuan, LV Na, ZHANG Haifeng, et al. Analysis of formation and degradation mechanism of soluble microbial product and its effect on membrane filterability for membrane bioreactor[J]. CIESC Journal, 2013, (8): 3003-3008.
DOI：

XI Lijuan, LV Na, ZHANG Haifeng, et al. Analysis of formation and degradation mechanism of soluble microbial product and its effect on membrane filterability for membrane bioreactor[J]. CIESC Journal, 2013, (8): 3003-3008. DOI： 10.3969/j.issn.0438-1157.2013.08.043.

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。

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.

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