Institute of Resources and Environmental Engineering, Shanxi University, Taiyuan 030006, PR China.
Bioresour Technol. 2013 Jun;137:404-8. doi: 10.1016/j.biortech.2013.03.158. Epub 2013 Mar 30.
This study investigated the membrane fouling in MBRs under sub-critical flux condition. Results showed membrane fouling at subcritical flux evolved through a three-stage process: a slow linear increase in transmembrane pressure (TMP) (stage I), followed by an exponential increase in TMP (stage II), and finally a rapid linear TMP rise was observed at stage III. It was found that bound EPS would play a significant role in fouling development at stage I, while SMPs appeared to be the major contributor to self-accelerating fouling phenomena observed at stage II. At stage III, the entire membrane was covered by a cake layer of flocs, as the result, the fouling rate was likely determined by floc characteristics. This study offers new insights into the fouling development under sub-critical flux condition.
本研究考察了亚临界通量条件下 MBR 中的膜污染情况。结果表明，亚临界通量下的膜污染经历了三个阶段的演变过程：跨膜压力（TMP）的缓慢线性增加（阶段 I），随后是 TMP 的指数增加（阶段 II），最后在阶段 III 观察到 TMP 的快速线性上升。研究发现，结合性 EPS 在阶段 I 的污染发展中起着重要作用，而 SMP 似乎是在阶段 II 观察到的自加速污染现象的主要贡献者。在阶段 III 中，整个膜被絮体的滤饼层覆盖，因此，污染速率可能由絮体特性决定。本研究为亚临界通量条件下的污染发展提供了新的见解。
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