Center of Wastewater Resource Recovery, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China.
Center of Wastewater Resource Recovery, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China.
Bioresour Technol. 2020 Oct;313:123680. doi: 10.1016/j.biortech.2020.123680. Epub 2020 Jun 13.
Psychrophilic microbial fuel cell (PMFC) offers an alternative method for low temperature wastewater treatment, but is seldom reported. In this study, the two-chamber PMFC was constructed at 10 °C using acetate as an electron donor. The maximum voltage under external resistance of 1000 Ω was around 550 mV. The columbic efficiency (CE) was 82.4% under external resistance of 100 Ω and the max power density was 582.4 mW/m. After temperature decreasing to 4 °C, the maximum voltage also reached 530 mV and CE was 38.4%. The direct electron transfer was proposed in PMFC according to cyclic voltammetry curves. The short enriching time (~30 days) of biofilm in the anodic electrode may be due to the high activity of enriched novel exoelectrogens of M. fermentans (46.2%) and E. lemanii (15.4%). The development of PMFC involved biotechnologies in low temperature regions shall benefit for valuable chemicals production and energy generation in the future.
嗜冷微生物燃料电池（PMFC）为低温废水处理提供了一种替代方法，但很少有报道。本研究在 10°C 下构建了双室 PMFC，以乙酸盐作为电子供体。在 1000Ω 的外部电阻下，最大电压约为 550mV。在 100Ω 的外部电阻下，库仑效率（CE）为 82.4%，最大功率密度为 582.4mW/m。温度降低到 4°C 后，最大电压也达到 530mV，CE 为 38.4%。根据循环伏安曲线，提出了 PMFC 中的直接电子转移。阳极电极中生物膜的短富集时间（~30 天）可能是由于富集的新型发酵单胞菌（46.2%）和雷曼氏菌（15.4%）的高活性。PMFC 的发展涉及低温地区的生物技术，未来将有利于有价值的化学品生产和能源的产生。
