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AuthorMohanakrishna, G.
AuthorMohanakrishna, Gunda
AuthorVanbroekhoven, Karolien
AuthorPant, Deepak
Available date2019-09-19T08:43:44Z
Publication Date2018-06-01
Publication NameReaction Chemistry and Engineering
Identifierhttp://dx.doi.org/10.1039/c7re00220c
CitationMohanakrishna, Gunda & Vanbroekhoven, Karolien & Pant, Deepak. (2018). Impact of Dissolved Carbon Dioxide Concentration on Process Parameters during its Conversion to Acetate through Microbial Electrosynthesis. Reaction Chemistry & Engineering. 3. 10.1039/C7RE00220C.
URIhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85048082796&origin=inward
URIhttp://hdl.handle.net/10576/11890
Abstract© 2018 The Royal Society of Chemistry. The reduction of carbon dioxide (CO2) released from industry can help to reduce the emissions of greenhouse gases (GHGs) to the atmosphere while at the same time producing value-added chemicals and contributing to carbon fixation. Microbial electrosynthesis (MES) is a recently developed process which accomplishes this idea by using cathodic bacteria at the expense of only minimum energy. In this study, enriched mixed homoacetogenic bacteria as cathodic biocatalysts for the reduction of CO2 with five different concentrations were evaluated to produce acetate at a constant potential. Increasing the carbon concentration showed an improved acetate production rate and carbon conversion efficiency. A maximum acetate production rate of 142.2 mg L per day and a maximum carbon conversion efficiency of 84% were achieved, respectively, at 4.0 and 2.5 g HCO3- L-1. The changes in pH due to interactive reactions between the bicarbonate (substrate) and acetate (products) were able to create a buffering nature in the catholyte controlling the operating parameters of the MES process, such as pH and substrate specificity. A higher acetate production shifted the catholyte pH toward acidic conditions, which further triggered favorable conditions for the bioelectrochemical reduction of acetate to ethanol.
SponsorG. Mohanakrishna gratefully acknowledges the Marie-Curie Intra-European Fellowship (IEF) supported project BIO-ELECTRO-ETHYLENE (Grant No: 626959) from the European Commission.
Languageen
PublisherRoyal Society of Chemistry
SubjectMicrobial fuel cells
Fuel cell
Cells MFCs
TitleImpact of dissolved carbon dioxide concentration on the process parameters during its conversion to acetate through microbial electrosynthesis
TypeArticle
Pagination371-378
Issue Number3
Volume Number3
ESSN2058-9883
dc.accessType Abstract Only


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