Improvement in biohydrogen and volatile fatty acid production from seaweed through addition of conductive carbon materials depends on the properties of the conductive materials

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dc.contributor.authorDeng, Chen
dc.contributor.authorLin, Richen
dc.contributor.authorKang, Xihui
dc.contributor.authorWu, Benteng
dc.contributor.authorWall, David M.
dc.contributor.authorMurphy, Jerry D.
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderEuropean Regional Development Funden
dc.contributor.funderEnvironmental Protection Agencyen
dc.contributor.funderSustainable Energy Authority of Irelanden
dc.contributor.funderGas Networks Irelanden
dc.date.accessioned2022-07-25T15:06:48Z
dc.date.available2022-07-25T15:06:48Z
dc.date.issued2022-01
dc.date.updated2022-07-25T14:46:03Z
dc.description.abstractFermentative production of biohydrogen and volatile fatty acids (VFAs) from advanced feedstocks such as seaweed provides opportunities in the carbon-neutral bioeconomy. The gap in the state of the art exists in overcoming both the low fermentation efficiency associated with the rigid structure of seaweed and the inefficient metabolic electron transfer within the microbial communities. This study evaluated the effects of carbonaceous additives (such as graphene and various biochars) on biohydrogen fermentation of glucose, cellulose, and the brown seaweed Laminaria digitata. The impacts of carbonaceous additives varied significantly in terms of hydrogen production, VFA profiles, and microbial communities. Graphene and wood-derived biochar (Wood_Biochar) were shown to be superior to draff-derived biochars. In the fermentation of L. digitata, graphene and Wood_Biochar significantly reduced the lag-phase time by 47% and 49%, respectively. Microbial analysis revealed that the enhanced fermentation was ascribed to the enrichment of Thermoanaerobacterium genus in response to carbonaceous additives. Kinetic correlations between the fermentation parameters and the properties of the additives suggested that the graphitic structure and electrical conductivity might play a crucial role in facilitating the fermentation. The mechanisms might be ascribed to (1) the supported biofilm growth and (2) enhancement in microbial electron transfer induced by the additives.en
dc.description.sponsorshipScience Foundation Ireland (Grant number 16/SP/3829); European Regional Development Fund (Interreg NWE Project BioWILL [No. NWE 964]); Environmental Protection Agency – Ireland (Grant number 2018-RE-MS-13); Sustainable Energy Authority Ireland (Grant number RDD/00454)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid122188en
dc.identifier.citationDeng, C., Lin, R., Kang, X., Wu, B., Wall, D. M. and Murphy, J. D. (2022) 'Improvement in biohydrogen and volatile fatty acid production from seaweed through addition of conductive carbon materials depends on the properties of the conductive materials', Energy, 239, 122188 (16pp). doi: 10.1016/j.energy.2021.122188en
dc.identifier.doi10.1016/j.energy.2021.122188en
dc.identifier.endpage16en
dc.identifier.issn0360-5442
dc.identifier.journaltitleEnergyen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/13401
dc.identifier.volume239en
dc.language.isoenen
dc.publisherElsevieren
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.rights© 2021 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).en
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subjectFermentative hydrogen-productionen
dc.subjectInterspecies electron-transferen
dc.subject2-phase anaerobic-digestionen
dc.subject2-stage fermentationen
dc.subjectBiochar additionen
dc.subjectGlucoseen
dc.subjectEthanolen
dc.subjectBiomassen
dc.subjectMicroalgaeen
dc.subjectCelluloseen
dc.subjectBiohydrogenen
dc.subjectCarbonaceous materialsen
dc.subjectBiocharen
dc.subjectGrapheneen
dc.subjectElectron transferen
dc.titleImprovement in biohydrogen and volatile fatty acid production from seaweed through addition of conductive carbon materials depends on the properties of the conductive materialsen
dc.typeArticle (peer-reviewed)en
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