School of Civil Engineering, Southeast University, Dongnan Daxue Road 2, Jiangning District, Nanjing 211189, China.
School of Civil Engineering, Southeast University, Dongnan Daxue Road 2, Jiangning District, Nanjing 211189, China.
Bioresour Technol. 2023 Nov;387:129580. doi: 10.1016/j.biortech.2023.129580. Epub 2023 Jul 27.
The utilization of membrane foulant is expected to push forward the developments of membrane bioreactor (MBR). In this study, the combination of microbial fuel cell (MFC) with bio-electrochemical enhanced hydrolysis process was proposed, and three systems were conducted to utilize the membrane foulant and simultaneously harvest electricity. Polysaccharides (PS), proteins (PN) and humic acid (HA) concentration variations and the fluorescent compound changes in different chambers revealed the biodegradability of membrane foulant. Optimized HRT improved the hydrolysis of membrane foulant while allowing MFC to utilize the biodegradable components efficiently. MFC-MFC system had the highest voltage and satisfactory effluent quality at HRT of 1 d. Microbial community structure analysis indicated that Proteobacteria, Planctomycetes and Bacteroidetes were the majority phyla and network analysis further revealed that Proteobacteria played a key role in membrane foulant utilization. This study suggests that MFC hybrid systems has potential application for synchronous membrane foulant reuse and energy recovery.
膜污染物的利用有望推动膜生物反应器（MBR）的发展。在这项研究中，提出了微生物燃料电池（MFC）与生物电化学强化水解过程的结合，以利用膜污染物并同时收获电能。通过不同腔室中多糖（PS）、蛋白质（PN）和腐殖酸（HA）浓度的变化和荧光化合物的变化，揭示了膜污染物的生物降解性。优化的水力停留时间（HRT）提高了膜污染物的水解效率，同时使 MFC 能够有效地利用可生物降解的成分。在 HRT 为 1 天的条件下，MFC-MFC 系统具有最高的电压和令人满意的出水水质。微生物群落结构分析表明，变形菌门、浮霉菌门和拟杆菌门是主要的菌群，网络分析进一步表明，变形菌门在膜污染物的利用中起着关键作用。本研究表明，MFC 混合系统具有同步膜污染物再利用和能量回收的应用潜力。
