Competition between Methanogens and Acetogens in Biocathodes: A Comparison between Potentiostatic and Galvanostatic Control

International Journal of Molecular Sciences

Annemiek ter Heijne¹  Pradip Saha¹  Sam D. Molenaar²  Annemerel R. Mol²  Cees J. N. Buisman²  Tom H. J. A. Sleutels² 

[1] Department of Environmental Technology, Wageningen University, Bornse Weilanden 9, 6708 WG Wageningen, The Netherlands;Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911 MA Leeuwarden, The Netherlands;

关键词: biocathode;    acetate;    current density;    microbial electrosynthesis (MES);    bioelectrochemical systems (BES);    kinetics;    thermodynamics;    methanogen;    acetogen;    competition;   

DOI  :  10.3390/ijms18010204

来源: DOAJ

【 摘 要 】

Microbial electrosynthesis is a useful form of technology for the renewable production of organic commodities from biologically catalyzed reduction of CO2. However, for the technology to become applicable, process selectivity, stability and efficiency need strong improvement. Here we report on the effect of different electrochemical control modes (potentiostatic/galvanostatic) on both the start-up characteristics and steady-state performance of biocathodes using a non-enriched mixed-culture inoculum. Based on our results, it seems that kinetic differences exist between the two dominant functional microbial groups (i.e., homoacetogens and methanogens) and that by applying different current densities, these differences may be exploited to steer product selectivity and reactor performance.

【 授权许可】

Unknown