State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, Jiangsu, PR China.
Bioresour Technol. 2012 Oct;122:35-41. doi: 10.1016/j.biortech.2012.05.029. Epub 2012 May 17.
This study aims to investigate the effect of carriers on membrane fouling. Three sets of submerged membrane bioreactors (MBRs), including one suspended-growth MBR, called SMBR, and two attached-growth MBRs (one called AMBR, and another with baffles called AMBRb) were operated at various media volume fractions. The results indicated that the membrane-fouling rates of AMBR and AMBRb were lower than that of SMBR. Moreover, the operation times of AMBR and AMBRb were 4.2 and 3.5 times longer, respectively, than that of SMBR at an optimum media volume fraction of 30%. The biochemical effects of carriers on sludge suspension significantly affected membrane fouling, unlike the physical effects of carriers. Further studies on sludge characteristics indicated that particle size, soluble microbial product (SMP), sludge volume index (SVI) and filament index (FI) did not remarkably affect membrane fouling, whereas the protein in bound EPS primarily contributed to membrane fouling.
本研究旨在探讨载体对膜污染的影响。三组浸没式膜生物反应器（MBR），包括一个悬浮生长 MBR，称为 SMBR，和两个附着生长 MBR（一个称为 AMBR，另一个带有挡板称为 AMBRb），在不同的介质体积分数下运行。结果表明，AMBR 和 AMBRb 的膜污染速率低于 SMBR。此外，在最佳介质体积分数为 30%时，AMBR 和 AMBRb 的运行时间分别比 SMBR 长 4.2 和 3.5 倍。载体对污泥悬浮的生化效应显著影响膜污染，而载体的物理效应则不然。进一步的污泥特性研究表明，粒径、可生物降解性微生物产物（SMP）、污泥体积指数（SVI）和丝状菌指数（FI）对膜污染没有显著影响，而结合 EPS 中的蛋白质主要导致膜污染。
