The role of EPS concentration on membrane fouling control: Comparison analysis of hybrid membrane bioreactor and conventional membrane bioreactor
The role of EPS concentration on membrane fouling control: Comparison analysis of hybrid membrane bioreactor and conventional membrane bioreactor
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EPS浓度对膜污染控制的作用：混合膜生物反应器与常规膜生物反应器的比较分析
DOI：
10.1016/j.desal.2012.08.013
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发表时间：
2012-11-01
期刊：
影响因子：
9.9
通讯作者：
Wang, Xiaochang
中科院分区：
文献类型：
--
作者：
Liu, Yongjun;Liu, Zhe;Wang, Xiaochang
在常规膜生物反应器（CMBR）中添加生物膜载体，构建复合式膜生物反应器（HMBR），并对比研究了胞外聚合物（EPS）对HMBR和CMBR处理城市污水中膜污染控制的作用。结果表明，HMBR中可溶性EPS（S-EPS）、松散结合EPS（LB-EPS）和紧密结合EPS（TB-EPS）的含量分别比CMBR降低了42.9%、41.6%和1.5%;活性污泥的物理性质，如上清液浊度（ST），污泥体积指数（SVI）和颗粒结构被发现有很大的影响LB-EPS浓度。EPS的主要组分为蛋白质、碳水化合物和腐殖质，各组分对污泥物理性质的影响程度为多糖>蛋白质>腐殖质。相同运行周期后，HMBR的滤饼层阻力Rc和孔阻力Rp分别为CMBR的43%和56%。结果表明，膜生物反应器的跨膜压（TMP）达到规定最大值20 kPa的时间由CMBR的57 d延长到HMBR的97 d。HMBR的运行可以有效控制LB-EPS的浓度，进而有效控制膜污染。(C)2012 Elsevier B. V.保留所有权利。
A hybrid membrane bioreactor (HMBR) was developed by adding biofilm carriers into a conventional membrane bioreactor (CMBR), and comparison experiments were conducted to investigate the role of extracellular polymeric substances (EPS) on membrane fouling control in HMBR and CMBR for municipal wastewater treatment. Results showed that the concentrations of soluble EPS (S-EPS), loosely bond EPS (LB-EPS) and tightly bond EPS (TB-EPS) in the HMBR were decreased by 42.9%, 41.6% and 1.5%, respectively, compared with the CMBR. The physical properties of the activated sludge such as supernatant turbidity (ST), sludge volume index (SVI) and particle structure were found to be strongly influenced by LB-EPS concentration. In addition, major components of EPS could be detected as proteins, carbohydrates and humus, influence level of different components on sludge physical properties is polysaccharides > proteins > humus. After the same operational period, the cake layer resistance R-c and pore resistance R-p in the HMBR accounted for 43% and 56% of that in the CMBR, respectively. It resulted the duration of transmembrane pressure (TMP) to reach the prescribed maximum of 20 kPa from 57 days in the CMBR prolonged to 97 days in the HMBR. HMBR operation could control the LB-EPS concentration, and further controled the membrane fouling effectively. (C) 2012 Elsevier B.V. All rights reserved.