Energy advantage of anode electrode rotation over anolyte recirculation for operating a tubular microbial fuel cell

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dc.contributor.authorPan, Yuanen
dc.contributor.authorZhu, Tongen
dc.contributor.authorHe, Zhenen
dc.contributor.departmentCivil and Environmental Engineeringen
dc.date.accessioned2020-02-03T17:44:44Zen
dc.date.available2020-02-03T17:44:44Zen
dc.date.issued2019en
dc.description.abstractMixing plays a key role in both electricity generation and organic removal in microbial fuel cells (MFCs) via affecting substrate distribution and internal resistance. Herein, two mixing methods, anode electrode rotation and anolyte recirculation, were investigated in terms of energy consumption and production. Anode electrode rotation could increase the maximum power density and COD removal by 81.5 and 45.7%, respectively, when the rotating speed increased from 0 to 45 rpm. Likewise, anolyte recirculation also improved the power density and COD removal by 43.1 and 30.1%, respectively, at an increasing rate from 0 to 300 mL min−1. The enhancement of electricity generation became less significant at a high mixing level, likely because that substrate supply was relatively sufficient and other factors posed more effects on electricity generation. The MFC with anode electrode rotation achieved a higher energy balance (e.g., 0.254 kWh kg COD−1 at 35 rpm) than the one without any mixing (0.124 kWh kg COD−1), while anolyte recirculation led to a lower or even negative energy balance compared to that with no mixing. The results of this study have demonstrated energy advantages of anode electrode rotation and encouraged further exploration of energy-efficient mixing methods for MFC operation.en
dc.description.sponsorshipThis work was partially supported by National Science Foundation (#1603190), the National Natural Science Foundation of China (21677030, 51608099), and the Fundamental Research Funds for the Central Universities (N170304016). Yuan Pan was financially supported by an award from China Scholarship Council. The authors would like to thank Mr. Shiqiang Zou (Virginia Tech) and Dr. Mohan Qin (Yale University) for their helpful discussion. Publication of this paper is supported by Virginia Tech Open Access Subvention Fund.en
dc.format.extent5 pagesen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1016/j.elecom.2019.106529en
dc.identifier.urihttp://hdl.handle.net/10919/96673en
dc.identifier.volume106en
dc.language.isoenen
dc.publisherElsevieren
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectMicrobial fuel cellsen
dc.subjectMixing Energy consumption and productionen
dc.subjectElectrode rotationen
dc.subjectElectrolyte recirculationen
dc.titleEnergy advantage of anode electrode rotation over anolyte recirculation for operating a tubular microbial fuel cellen
dc.title.serialElectrochemistry Communicationsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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