Juntawang Chaipon, Rongsayamanont Chaiwat, Khan Eakalak
Environmental and Conservation Sciences Program, North Dakota State University, Fargo, ND 58108, USA.
Research Center for Environmental Assessment and Technology for Hazardous Waste Management, Faculty of Environmental Management, Prince of Songkla University, Hat Yai, Songkhla, 90112, Thailand.
Chemosphere. 2017 Nov;187:147-155. doi: 10.1016/j.chemosphere.2017.08.113. Epub 2017 Aug 30.
A laboratory scale study on treatment performances and fouling of entrapped cells-based-anaerobic membrane bioreactor (E-AnMBR) in comparison with suspended cells-based-bioreactor (S-AnMBR) treating domestic wastewater was conducted. The difference between E-AnMBR and S-AnMBR was the uses of cells entrapped in phosphorylated polyvinyl alcohol versus planktonic cells. Bulk organic removal efficiencies by the two AnMBRs were comparable. Lower concentrations of suspended biomass, bound extracellular polymeric substances and soluble microbial products in E-AnMBR resulted in less fouling compared to S-AnMBR. S-AnMBR provided 7 days of operation time versus 11 days for E-AnMBR before chemical cleaning was required. The less frequent chemical cleaning potentially leads to a longer membrane life-span for E-AnMBR compared to S-AnMBR. Phyla Proteobacteria, Chloroflexi, Bacteroidetes and Acidobacteria were dominant in cake sludge from both AnMBRs but their abundances were different between the two AnMBRs, suggesting influence of cell entrapment on the bacteria community.
进行了一项实验室规模的研究，比较了基于固定化细胞的厌氧膜生物反应器（E-AnMBR）和基于悬浮细胞的生物反应器（S-AnMBR）处理生活污水的处理性能和污垢情况。E-AnMBR和S-AnMBR的区别在于，前者使用固定在磷酸化聚乙烯醇中的细胞，而后者使用浮游细胞。两种厌氧膜生物反应器的总体有机物去除效率相当。与S-AnMBR相比，E-AnMBR中较低浓度的悬浮生物质、结合态胞外聚合物和可溶性微生物产物导致的污垢更少。在需要化学清洗之前，S-AnMBR的运行时间为7天，而E-AnMBR为11天。与S-AnMBR相比，E-AnMBR较少频繁进行化学清洗，这可能导致其膜的使用寿命更长。变形菌门、绿弯菌门、拟杆菌门和酸杆菌门在两种厌氧膜生物反应器的滤饼污泥中占主导地位，但它们在两种反应器中的丰度不同，这表明细胞固定对细菌群落有影响。
