Cid Clement A, Stinchcombe Andrew, Ieropoulos Ioannis, Hoffmann Michael R
Linde+Robinson Laboratories, California Institute of Technology, Pasadena, CA, USA.
Bristol BioEnergy Centre, Bristol Robotics Laboratory, University of the West of England, BS16 1QY, UK.
J Power Sources. 2018 Oct 1;400:441-448. doi: 10.1016/j.jpowsour.2018.08.051.
Microbial fuel cell (MFC) systems have the ability to oxidize organic matter and transfer electrons to an external circuit as electricity at voltage levels of <1 V. Urine has been shown to be an excellent feedstock for various MFC systems, particularly MFCs inoculated with activated sludge and with a terracotta ceramic membrane separating carbon-based electrodes. In this article, we studied a MFC system composed of two stacks of 32 individual cells each sharing the same anolyte. By combining the current produced by the 32 cells connected in parallel and by adding the potential of both stacks connected in series, an average power density of 23 mW m was produced at an effective current density of 65 mA m for more than 120 days. [NH], TIC, COD, and TOC levels were monitored frequently to understand the chemical energy conversion to electricity as well as to determine the best electrical configuration of the stacks. Archaeal and bacterial populations on selected anode felts and in the anolyte of both stacks were investigated as well. Indicator microorganisms for bacterial waterborne diseases were measured in anolyte and catholyte compartments to evaluate the risk of reusing the catholyte in a non-regulated environment.
微生物燃料电池（MFC）系统能够氧化有机物，并在电压低于1V时将电子作为电流传输到外部电路。尿液已被证明是各种MFC系统的优质原料，尤其是接种活性污泥且采用陶土陶瓷膜分隔碳基电极的MFC。在本文中，我们研究了一个由两堆32个单电池组成的MFC系统，每堆电池共享相同的阳极电解液。通过将32个并联连接的电池产生的电流相加，并将两堆串联连接的电池的电势相加，在超过120天的时间里，有效电流密度为65mA/m²时，产生了23mW/m²的平均功率密度。频繁监测[NH]、总无机碳（TIC）、化学需氧量（COD）和总有机碳（TOC）水平，以了解化学能向电能的转化，并确定电池堆的最佳电气配置。还研究了所选阳极毡上以及两堆电池阳极电解液中的古菌和细菌种群。在阳极电解液和阴极电解液隔室中测量了细菌性水传播疾病的指示微生物，以评估在无监管环境中重复使用阴极电解液的风险。
