Sub-Department of Environmental Technology, Wageningen University, Bomenweg 2, P.O. Box 8129, 6700 EV Wageningen, The Netherlands.
Bioresour Technol. 2011 Dec;102(24):11172-6. doi: 10.1016/j.biortech.2011.09.078. Epub 2011 Sep 29.
To create an efficient bioelectrochemical system, a high Coulombic efficiency is required. This efficiency is a direct measure for the competition between electrogens and methanogens when acetate is used as substrate. In this study the Coulombic efficiency in a microbial electrolysis cell was investigated. As a result of an increase in substrate concentration from 1 to 35 mM, the current density increased to 21.1A/m(2), while the Coulombic efficiency decreased to 52%. As a result of an increase in anode potential from -450 to -0.250 mV, the current density increased to 20.9A/m(2), while the Coulombic efficiency increased 21%. Knowledge about the substrate affinity and growth kinetics is crucial to control the Coulombic efficiency. Further research is required to optimize strategies to find a balance between the Coulombic efficiency, current density and removal rate of organic material.
为了创建一个高效的生物电化学系统，需要高库仑效率。当乙酸盐作为底物时，该效率是电生成菌和产甲烷菌竞争的直接衡量标准。在这项研究中，研究了微生物电解池中的库仑效率。由于底物浓度从 1 mM 增加到 35 mM，电流密度增加到 21.1 A/m(2)，而库仑效率降低到 52%。由于阳极电势从-450 mV 增加到-0.250 mV，电流密度增加到 20.9 A/m(2)，而库仑效率增加了 21%。了解底物亲和力和生长动力学对于控制库仑效率至关重要。需要进一步研究以优化策略，在库仑效率、电流密度和有机物质去除率之间找到平衡。
