Improved efficiency of anaerobic digestion through direct interspecies electron transfer at mesophilic and thermophilic temperature ranges

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dc.contributor.authorLin, Richen
dc.contributor.authorCheng, Jun
dc.contributor.authorDing, Lingkan
dc.contributor.authorMurphy, Jerry D.
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderMinistry of Science and Technology of the People's Republic of Chinaen
dc.contributor.funderNatural Science Foundation of Zhejiang Provinceen
dc.contributor.funderHorizon 2020en
dc.contributor.funderGas Networks Irelanden
dc.date.accessioned2018-06-06T14:07:17Z
dc.date.available2018-06-06T14:07:17Z
dc.date.issued2018-05-30
dc.date.updated2018-06-06T13:53:09Z
dc.description.abstractDirect interspecies electron transfer (DIET) in microbial communities plays a significant role in improving efficiency of biomethane production from anaerobic digestion. In this study, the impacts of conductive graphene on mesophilic and thermophilic anaerobic digestion (MAD and TAD) were comparatively assessed using the model substrate ethanol. The maximum electron transfer flux for graphene-based DIET was calculated at mesophilic and thermophilic temperatures (35 °C and 55 °C). Biomethane potential results showed that the addition of graphene (1.0 g/L) significantly enhanced biomethane production rates by 25.0% in MAD and 26.4% in TAD. The increased biomethane production was accompanied with enhanced ethanol degradation. The theoretical calculation for maximum DIET flux showed that graphene-based DIET in MAD (76.4 mA) and TAD (75.1 mA) were at the same level, which suggests temperature might not be a significant factor affecting DIET. This slight difference was ascribed to the different Gibbs free energy changes of the overall DIET reaction (CH3CH2OH + 1/2CO2 → 1/2CH4 + CH3COO- + 5H+) in MAD and TAD. Microbial analysis revealed that the dominant microbes in response to graphene addition were distinctly different between MAD and TAD. The results indicated that the bacteria of Levilinea dominated in MAD, while Coprothermobacter dominated in TAD. The abundance of archaeal Methanobacterium decreased, while Methanosaeta increased with increasing temperature.en
dc.description.sponsorshipMinistry of Science and Technology of the People's Republic of China (National key research and development program-China (2016YFE0117900)); Natural Science Foundation of Zhejiang Province (Zhejiang Provincial key research and development program-China (2017C04001)); Gas Networks Ireland, GNI (co-funded by ERVIA and Gas Networks Ireland (GNI) through the Gas Innovation Group);en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationLin, R., Cheng, J., Ding, L. and Murphy, J. D. (2018) 'Improved efficiency of anaerobic digestion through direct interspecies electron transfer at mesophilic and thermophilic temperature ranges', Chemical Engineering Journal, In Press, doi: 10.1016/j.cej.2018.05.173en
dc.identifier.doi10.1016/j.cej.2018.05.173
dc.identifier.endpage55en
dc.identifier.issn1385-8947
dc.identifier.journaltitleChemical Engineering Journalen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/6254
dc.language.isoenen
dc.publisherElsevieren
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Research Centres Supplement/12/RC/2302s/IE/Marine Renewable Energy Ireland (MaREI) - EU Grant Manager/en
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Research Centres/12/RC/2302/IE/Marine Renewable Energy Ireland (MaREI) - The SFI Centre for Marine Renewable Energy Research/en
dc.relation.projectinfo:eu-repo/grantAgreement/EC/H2020::MSCA-IF-EF-ST/797259/EU/Direct Interspecies Electron Transfer in advanced anaerobic digestion system for gaseous transport biofuel production/DIETen
dc.relation.urihttps://www.sciencedirect.com/science/article/pii/S1385894718309975
dc.rights© 2018 Elsevier B.V. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license.en
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectGrapheneen
dc.subjectEthanolen
dc.subjectMesophilic / thermophilic digestionen
dc.subjectInterspecies electron transferen
dc.titleImproved efficiency of anaerobic digestion through direct interspecies electron transfer at mesophilic and thermophilic temperature rangesen
dc.typeArticle (peer-reviewed)en
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