School of Environmental Science and Engineering, Tianjin University, Yaguan Road 135, Tianjin 300350, China.
School of Environmental Science and Engineering, Tianjin University, Yaguan Road 135, Tianjin 300350, China.
Bioresour Technol. 2017 Aug;237:178-185. doi: 10.1016/j.biortech.2017.03.002. Epub 2017 Mar 6.
This study constructed multiple-anode SMFCs with different anode spacing and investigated their long-term performance. Results show that multiple anodes extended electricity generation from SMFCs due to increased anode surface area, but the distance between the anodes showed limited effects on power output. Power generation was seriously inhibited when temperature was below 20°C, but system recovered once temperature rose based to ambient condition. The degradation of readily oxidizable organic matter (ROOM) and decomposition of refractory organics occurred simultaneously. Worms' growth in the sediment destabilized power output, caused the increase of COD and decrease of pH and DO in water layer, and affected the microbial communities in sediments. ANME-2D related to anaerobic oxidation of methane was enriched around anodes and might benefit electron transfer in SMFCs.
本研究构建了具有不同阳极间距的多阳极 SMFC，并研究了它们的长期性能。结果表明，多个阳极由于增加了阳极表面积而延长了 SMFC 的发电时间，但阳极之间的距离对功率输出的影响有限。当温度低于 20°C 时，发电严重受到抑制，但一旦根据环境条件升高温度，系统就会恢复。易氧化有机物（ROOM）的降解和难降解有机物的分解同时发生。沉积物中蠕虫的生长使产电量不稳定，导致水层中 COD 增加、pH 值和 DO 减少，并影响沉积物中的微生物群落。与甲烷厌氧氧化相关的 ANME-2D 在阳极周围富集，可能有利于 SMFC 中的电子传递。
