State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin 150090, China.
Bioresour Technol. 2012 Nov;123:566-73. doi: 10.1016/j.biortech.2012.07.047. Epub 2012 Jul 22.
This study focused on the effect of worm reactor on the fouling behaviors of extracellular polymeric substances (EPSs) in the MBR coupled with Static Sequencing Batch Worm Reactor (SSBWR-MBR). The filtration tests showed that the C-EPS (EPS in Control-MBR) and S-EPS (EPS in SSBWR-MBR) resulted in 76% and 67% of flux decrement, respectively. On both fouling layers, the preferential accumulation was protein, but the adsorption efficiency for protein in C-EPS was 20% higher than that in S-EPS. In comparison with the membrane fouled by C-EPS, the bio-volume of protein on the membrane fouled by S-EPS reduced 33%, and the protein porosity increased 20%. Meanwhile, the S-EPS approaching the membrane had to overcome×2.4 stronger repulsive interaction energy than C-EPS, and the membrane fouled by S-EPS exhibited relatively smoother compared to that fouled by C-EPS. As a result, the fouling potential of S-EPS was lower than that of C-EPS.
本研究关注了蠕虫反应器对 MBR 与静态序批式蠕虫反应器（SSBWR-MBR）偶联中胞外聚合物（EPS）结垢行为的影响。过滤测试表明，C-EPS（对照 MBR 中的 EPS）和 S-EPS（SSBWR-MBR 中的 EPS）分别导致通量下降了 76%和 67%。在两个结垢层上，优先积累的是蛋白质，但 C-EPS 中蛋白质的吸附效率比 S-EPS 高 20%。与 C-EPS 污染的膜相比，S-EPS 污染的膜上的蛋白质生物量减少了 33%，蛋白质孔隙率增加了 20%。同时，接近膜的 S-EPS 必须克服比 C-EPS 强×2.4 的排斥相互作用能，并且 S-EPS 污染的膜比 C-EPS 污染的膜更光滑。因此，S-EPS 的结垢潜力低于 C-EPS。
