This work develops a small-scale microbial fuel cell (MFC) and evaluates their performance in series or in parallel as a tubular MFC (t-MFC) in removing benzene from groundwater and generating electricity. The results indicate that the time required (t_r) for t-MFC to remove all benzene was half of that required by a single MFC. The maximum power density (P_max) of the serially-connected t-MFC was 12.7 mW/m², a 3.3-fold increase over the single t-MFC. An optimal benzene removal efficiency with a t_r of four days was achieved under persistent aeration at the cathode of the t-MFC, and this t_r was 1.25–3-fold lower than those obtained under other aeration conditions. Tubular MFCs connected in series had a higher open-circuited voltage (655 mV) and a lower t_r, but the P_max and maximum current density of the parallelly-connected t-MFC were 3.8 and 1.5 times those of the t-MFC with a serial connection. Intermittent aerating of the cathode improved the removal of benzene and the generation of electricity in a t-MFC by providing sufficient levels of oxygen for the reaction to achieve P_max. The small t-MFC was easily scaled up by stacking MFCs in series mode, with great potential for field-scale application for in situ bioremediation in hydrocarbon-contaminated groundwater.

这项工作开发了一种小型微生物燃料电池（MFC），并作为管状MFC（t-MFC）串联或并联地评估了它们从地下水中去除苯并发电的性能。结果表明，t-MFC除去所有苯所需的时间（t _r）是单个MFC所需时间的一半。串联的t-MFC的最大功率密度（P _max）为12.7 mW / m ²，是单个t-MFC的3.3倍。在t-MFC阴极持续通气的情况下，在_r为4天时达到了最佳的苯去除效率，并且该t _r比其他曝气条件下的低1.25-3倍。串联连接的管状MFC具有较高的开路电压（655 mV）和较低的_r，但并联的t-MFC的P _max和最大电流密度分别是t-MFC的3.8和1.5倍。串行连接。通过为反应提供足够的氧气水平以达到P _max，对阴极进行间歇曝气可改善t-MFC中苯的去除和电的产生。通过串联堆叠MFC可以轻松扩大小型t-MFC的规模，对于在烃污染的地下水中进行原位生物修复的现场规模应用具有很大的潜力。