Effects of pre-treatment and biological acidification on fermentative hydrogen and methane co-production

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dc.contributor.authorSun, Chihe
dc.contributor.authorXia, Ao
dc.contributor.authorFu, Qian
dc.contributor.authorHuang, Yun
dc.contributor.authorLin, Richen
dc.contributor.authorMurphy, Jerry D.
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderHorizon 2020en
dc.contributor.funderNational Natural Science Foundation of Chinaen
dc.contributor.funderVenture and Innovation Support Program for Chongqing Overseas Returnees, China
dc.contributor.funderNational Science Foundation for Young Scientists of China
dc.contributor.funderFundamental Research Funds for the Central Universities, China
dc.date.accessioned2019-02-27T10:02:59Z
dc.date.available2019-02-27T10:02:59Z
dc.date.issued2019-02-19
dc.date.updated2019-02-27T09:40:15Z
dc.description.abstractA sequential two-stage process comprising biological acidification followed by anaerobic digestion was proposed to enhance gaseous biofuel production from the mixture of rice residue and micro-algae after thermo-chemicial hydrolysis. The maximum specific hydrogen yield of 223.1 ± 8.8 mL/g volatile solids (VS) and production rate of 10.4 ± 0.4 mL/g VS/h were achieved from hydrothermal acid pre-treated biomass during biological acidification. Increase in hydraulic retention time of biological acidification from 12 to 144 h significantly affected the distribution of solubilised metabolic products and led to improved biological acidification rates (BARs) from 15.5% to 78.5%. Compared with single stage anaerobic digestion, the first stage acidification phase led to reductions in the lag-phase time and peak time of anaerobic digestion in such a two-stage process. The maximum specific methane production rate of 2.2 ± 0.03 mL/g VS/h was achieved with a deep acidification of 144 h yielding a BAR of 78.5%. Increasing the length of time in biological acidification from 12 to 144 h contributed to improved energy conversion efficiency of 25.4%–64% after 120 h of anaerobic digestion. These results demonstrate that biological acidification is feasible to improve bioenergy recovery in two-stage fermentation.en
dc.description.sponsorshipNational Science Foundation for Young Scientists of China (No. 51606021); State Key Program of National Natural Science of China (No. 51836001); Venture and Innovation Support Program for Chongqing Overseas Returnees (No. cx2017019); Fundamental Research Funds for the Central Universities (Nos. 2018CDXYDL0001, 2018CDYJSY0055)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationSun, C., Xia, A., Fu, Q., Huang, Y., Lin, R. and Murphy, J. D. (2019) 'Effects of pre-treatment and biological acidification on fermentative hydrogen and methane co-production', Energy Conversion and Management, 185, pp. 431-441. doi:10.1016/j.enconman.2019.01.118en
dc.identifier.doi10.1016/j.enconman.2019.01.118
dc.identifier.endpage441en
dc.identifier.issn0196-8904
dc.identifier.journaltitleEnergy Conversion and Managementen
dc.identifier.startpage431en
dc.identifier.urihttps://hdl.handle.net/10468/7546
dc.identifier.volume185en
dc.language.isoenen
dc.publisherElsevier Ltd.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.urihttp://www.sciencedirect.com/science/article/pii/S0196890419301943
dc.rights© 2019, Elsevier Ltd. All rights reserved. This manuscript version is made available under the CC BY-NC-ND 4.0 license.en
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectFermentationen
dc.subjectHydraulic retention timeen
dc.subjectBiological acidificationen
dc.subjectBiomethaneen
dc.subjectAlgaeen
dc.subjectFood wasteen
dc.titleEffects of pre-treatment and biological acidification on fermentative hydrogen and methane co-productionen
dc.typeArticle (peer-reviewed)en
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