Kim, JR;
Boghani, HC;
Amini, N;
Aguey-Zinsou, K-F;
Michie, I;
Dinsdale, RM;
Guwy, AJ;
... Premier, GC; + view all
(2012)
Porous anodes with helical flow pathways in bioelectrochemical systems: The effects of fluid dynamics and operating regimes.
Journal of Power Sources
, 213
382 - 390.
10.1016/j.jpowsour.2012.03.040.
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Abstract
Bioelectrochemical systems (BES) and/or microbial fuel cell (MFC) mass transport and associated over-potential limitations are affected by flow regimes, which may simultaneously increase the power and pollution treatment capacities. Two electrodes with helical flow channels were compared in the same tubular MFC reactor. 1). A machined monolithic microporous conductive carbon (MMCC). 2). A layered carbon veil with spoked ABS former (LVSF); both presented helical flow channel. Anode performances were compared when subject to temperature, substrate concentration and flow rate variations. The MMCC maximum power increased from 2.9 ± 0.3 to 7.6 ± 0.7 mW with influent acetate concentration, from 1 to 10 mM (with 2 mL min−1), but decreased power to 5.5 ± 0.5 mW at 40 mM, implicated localized pH/buffering. Flow rate (0.1 to 7.5 mL min−1) effects were relatively small but an increase was evident from batch to continuous operation at 0.1 mL min−1. The LVSF configuration showed improved performance in power as the flow rate increased, indicating that flow pattern affects BES performance. Computational fluid dynamics (CFD) modelling showed less uniform flow with the LVSF. Thus flow regime driven mass transfer improves the power output in continuously fed system operation. These results indicate that electrode configuration, flow regime and operating condition need consideration to optimize the bioelectrochemical reaction.
| Type: | Article |
|---|---|
| Title: | Porous anodes with helical flow pathways in bioelectrochemical systems: The effects of fluid dynamics and operating regimes |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.jpowsour.2012.03.040 |
| Publisher version: | http://dx.doi.org/10.1016/j.jpowsour.2012.03.040 |
| Language: | English |
| Additional information: | This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
| Keywords: | Microbial fuel cell (MFC), Bioelectrochemical system (BES), Helical electrode, Micro-porous carbon, Carbon foam, Flow induced mass transfer |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1392897 |
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