期刊
BIORESOURCE TECHNOLOGY
卷 238, 期 -, 页码 519-527出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.04.072
关键词
Microbial fuel cell stack; Circuit alternation; Voltage reversal; Resolution; Simulation; Resistance
资金
- Swiss Federal Office for Energy [Sl/501243-01]
- Duttwyler Energietechnik
To understand the biotic and non-biotic contributions of voltage reversals in microbial fuel cell stacks (MFC) they were simulated with an electronic MFC-Stack mimic. The simulation was then compared with results from a real 3 L triple MFC-Stack with shared anolyte. It showed that voltage reversals originate from the variability of biofilms, but also the external load plays a role. When similar biofilm properties were created on all anodes the likelihood of voltage reversals was largely reduced. Homogenous biofilms on all anodes were created by electrical circuit alternation and electrostimulation. Conversely, anolyte recirculation, or increased nutriment supply, postponed reversals and unfavourable voltage asymmetries on anodes persisted. In conclusion, voltage reversals are often a negative event but occur also in close to best MFC-Stack performance. They were manageable and this with a simplified MFC architecture in which multiple anodes share the same anolyte. (C) 2017 Elsevier Ltd. All rights reserved.
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