Improving production of volatile fatty acids and hydrogen from microalgae and rice residue: effects of physiochemical characteristics and mix ratios

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dc.contributor.authorSun, Chihe
dc.contributor.authorXia, Ao
dc.contributor.authorLiao, Qiang
dc.contributor.authorFu, Qian
dc.contributor.authorHuang, Yun
dc.contributor.authorZhu, Xun
dc.contributor.authorWei, Pengfei
dc.contributor.authorLin, Richen
dc.contributor.authorMurphy, Jerry D.
dc.contributor.funderNational Natural Science Foundation of Chinaen
dc.contributor.funderHorizon 2020en
dc.contributor.funderScience Foundation Irelanden
dc.date.accessioned2018-10-12T11:34:08Z
dc.date.available2018-10-12T11:34:08Z
dc.date.issued2018-09-11
dc.date.updated2018-10-12T11:21:49Z
dc.description.abstractDark fermentation may be hindered by insufficient bioavailable carbon and nitrogen sources as well as recalcitrant cell wall structures of substrates. Protein-rich microalgae and carbohydrate-rich rice residue with various mix ratios can optimise biohydrogen and volatile fatty acids production. Optimal pretreatment of the microalgae with 1% H2SO4 and the rice residue with 0.5% H2SO4 under hydrothermal heating (140 °C, 10 min) achieved reducing sugar yields of 187.3 mg/g volatile solids (VS) (hydrolysis efficiency: 54%) and 924.9 mg/g VS (hydrolysis efficiency: 100%), respectively. Multiscale physiochemical characterisations of solid hydrolytic residues confirmed considerable damage to both substrates. Co-fermentation of pretreated rice residue and microalgae at a mix ratio of 5:1 exhibited the maximum hydrogen yield of 201.8 mL/g VS, a 10.7-fold increase compared to mono-fermentation of pretreated microalgae. The mix ratio of 25:1 resulted in the highest carbon to volatile fatty acids conversion (96.8%), corresponding to a maximum energy conversion efficiency of 90.8%.en
dc.description.sponsorshipNational Natural Science Foundation of China (National Science Foundation forYoung Scientists of China (No. 51606021), the InternationalCooperation and Exchange of the National Natural Science Foundationof China (No. 51561145013), the Fundamental Research Funds for theCentral Universities (No. 106112017CDJPT140001), and the Venture &Innovation Support Program for Chongqing Overseas Returnees (No.cx2017019));en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationSun, C., Xia, A., Liao, Q., Fu, Q., Huang, Y., Zhu, X., Wei, P., Lin, R. and Murphy, J. D. (2018) 'Improving production of volatile fatty acids and hydrogen from microalgae and rice residue: Effects of physicochemical characteristics and mix ratios', Applied Energy, 230, pp. 1082-1092. doi: 10.1016/j.apenergy.2018.09.066en
dc.identifier.doi10.1016/j.apenergy.2018.09.066
dc.identifier.endpage1092en
dc.identifier.issn0306-2619
dc.identifier.journaltitleApplied Energyen
dc.identifier.startpage1082en
dc.identifier.urihttps://hdl.handle.net/10468/7004
dc.identifier.volume230en
dc.language.isoenen
dc.publisherElsevieren
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.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.urihttp://www.sciencedirect.com/science/article/pii/S0306261918313709
dc.rights© 2018 Elsevier Ltd. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 licenseen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectMicroalgaeen
dc.subjectRice residueen
dc.subjectPretreatmenten
dc.subjectPhysicochemical characteristicsen
dc.subjectMix ratiosen
dc.subjectCo-fermentationen
dc.titleImproving production of volatile fatty acids and hydrogen from microalgae and rice residue: effects of physiochemical characteristics and mix ratiosen
dc.typeArticle (peer-reviewed)en
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