基于微生物电解电池（MEC）走向实用化的关键技术，研究了多电极组合放大MEC的产氢性能和影响因素。启动阶段发现多电池并联的放大MEC阳极性能平行性较好。当外加电压为0.6 V时，MEC2、MEC4的氢气产率仅比MEC1的最高氢气产率（1.32±0.27）L/（L·d）低6.1%，同时两者的库仑效率和总能量回收率仅比单电池MEC的分别低5.4%、1.8%和2.8%、0.9%。电化学阻抗分析实验表明，多电池并联放大MEC性能下降主要是由于系统扩散阻抗增大。采用溶液内循环增强内部扰动，MEC2、MEC4的最大氢气产率分别提高了29.8%、27.4%。

The amplification of reactor is one of the key factors for the practical application of microbial electrolysis cell (MEC).The hydrogen-production performance and the influence factors for the amplified MEC reactors with multiple electrodes combination are studied.It is found that the parallel stack of multiple electrodes has no obvious negative effect on start-up performance of MEC reactor and the parallelism of anode potential is high in the biofilm growth and stable operation period.When U_ap=0.6 V,the hydrogen production rates of both MEC2 and MEC4 are only 6.1% lower than the maximum hydrogen production rate (1.32±0.27) L/L·d of MEC1.Meanwhile the columbic efficiency and overall energy recovery rate of MEC2 are respectively 5.4% and 1.8% lower than that of MEC1,and that of MEC4 are separately 2.8% and 0.9% lower than MEC1.The experiments by electrochemical impedance spectroscopy (EIS) show that the performance decreases of multi-module in parallel amplified MEC is mainly caused by the augment of the diffusion impedance for the system.The enhanced internal disturbance by circulation in solution can help to increase the highest hydrogen production rates of MEC2 and MEC4 by 29.8% and 27.4%,respectively.

李福健(1988-),男,博士生,从事微生物电化学制氢的研究,lfj_forever@zju.edu.cn