State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
Bioresour Technol. 2011 Oct;102(19):8820-7. doi: 10.1016/j.biortech.2011.07.010. Epub 2011 Jul 18.
Two submerged membrane bioreactors were operated for a period of 3 months to study the filtration behavior of normal sludge and bulking sludge. Comparison of sludge morphology and bound extracellular polymeric substances (EPS) from the two systems was made to elucidate the different filtration characteristics. Experimental results showed that the membrane fouling behavior induced by bulking sludge was more severe than normal sludge. Concomitantly, the adsorption tests and atomic force microscopy observation confirmed that the EPS properties played an important role in membrane adsorption, eventually causing the different fouling behavior. Correlations between image analysis information and diluted sludge volume index (DSVI) have been identified. The combinations of EFLI/FAI (the ratio between extended filamentous lengths and floc area), from factor and floc elongation related parameters (aspect ratio or roundness) were the preferred input candidates in autoregressive exogenous model to describe the filamentous bulking phenomena, which aided in predicting membrane fouling.
两个浸没式膜生物反应器运行了 3 个月，以研究正常污泥和膨胀污泥的过滤行为。比较了两个系统中污泥形态和结合态胞外聚合物（EPS），以阐明不同的过滤特性。实验结果表明，膨胀污泥引起的膜污染行为比正常污泥更为严重。同时，吸附试验和原子力显微镜观察证实，EPS 特性在膜吸附中起着重要作用，最终导致了不同的污染行为。已经确定了图像分析信息与稀释污泥体积指数（DSVI）之间的相关性。丝状膨胀相关参数（丝状长度与絮体面积比 EFLI/FAI、絮体伸长率相关参数（长宽比或圆度））是自回归外生模型中描述丝状膨胀现象的首选输入候选，有助于预测膜污染。
