Development of the energy efficient wastewater treatment technology by stacked microbial fuel cells

为了建立高效的有机废水处理技术和电能回收利用，将两个微生物燃料电池串联起来，构建了叠层微生物燃料电池（StMFC）。以含糖废水（0.5gCOD/L）为进水进行连续流实验，以评价StMFC的处理性能。通过串联MFC稳定每个阳极槽中的有机物浓度和组成，StMFC在13小时的HRT（水力停留时间）下实现良好的COD去除（79%）和足够的发电（0.55W/m3-每个MFC）。此外，在每个阳极室中确认了诸如地质菌属和红细菌属的发电细菌的增殖。在电路的串联连接中观察到整个系统的电压值的增加，在并联连接中观察到整个系统的电流值的增加。

For the establishment of both efficient organic wastewater treatment technology and recovery of electric energy, the stacked microbial fuel cells (StMFCs) by series connection of two MFCs were developed. Continuous flow experiment feeding with sugar containing wastewater (0.5 gCOD/L) was conducted to evaluate process performance of the StMFCs. Both organic concentration and composition in each anode tank was stabilized by serial connection of MFCs, StMFCs achieved good COD removal (79%) and sufficient electric generation (0.55 W/m3- each MFC) at HRT (Hydraulic retention time) of 13 hours. Also, proliferation of electricity-generating bacteria, such as genus Geobactor and genus Rhodobacter, are confirmed in each anode chamber. The increase in observed voltage value for the entire system in the series connection of the electric circuit, the increase of the observed current value for the entire system was observed in a parallel connection.