Improving biohydrogen and biomethane co-production via two-stage dark fermentation and anaerobic digestion of the pretreated seaweed Laminaria digitata

dc.contributor.authorDing, Lingkan
dc.contributor.authorCheng, Jun
dc.contributor.authorLin, Richen
dc.contributor.authorDeng, Chen
dc.contributor.authorZhou, Junhu
dc.contributor.authorMurphy, Jerry D.
dc.contributor.funderNational Key Research and Development Program, Chinaen
dc.contributor.funderZhejiang Provincial Key Research and Development Program, Chinaen
dc.contributor.funderHorizon 2020en
dc.contributor.funderEnvironmental Protection Agencyen
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderErvia, Irelanden
dc.contributor.funderGas Networks Irelanden
dc.date.accessioned2020-02-11T13:07:53Z
dc.date.available2020-02-11T13:07:53Z
dc.date.issued2019-12-11
dc.date.updated2020-02-11T12:33:19Z
dc.description.abstractThe marine macro-alga Laminaria digitata is an abundant brown seaweed, which may be used as a feedstock for gaseous biofuel production via sequential dark fermentation and anaerobic digestion. Various methods, including hydrothermal pretreatment (HTP), hydrothermal dilute acid pretreatment (HTDAP), enzymolysis, and combinations thereof, were employed to depolymerize L. digitata and assess the effects on biohydrogen and biomethane yields. Scanning electron microscopic images revealed that the intact and smooth structure of the seaweed was severely damaged; some micro-pores and debris were generated after HTP (140 °C for 20 min), whilst the undegraded components remained as filamentous structures. The complex carbohydrate polymers in L. digitata constrained the catalytic effects of glucoamylase, leading to limited increase in the yield of carbohydrate monomers. With the aid of H2SO4 (1 v/v%) in HTP, depolymerization of biomass and its further conversion to carbohydrate monomers were significantly improved. The yield of total carbohydrate monomers after HTDAP (0.564 g/gVS) was 3.5-fold that in raw biomass; this led to an increase of 60.8% in biohydrogen yield (57.4 mL/gVS) in the first-stage dark fermentation. However, the generation of byproducts such as hydroxymethylfurfural under such harsh conditions impaired the second-stage anaerobic digestion of hydrogenogenic effluent, resulting in a 25.9% decrease in biomethane yield. HTP was considered the optimum pretreatment improving energy conversion efficiency from seaweed to gaseous biofuels by 26.7% as compared to that of the unpretreated L. digitata.en
dc.description.sponsorshipNational Key Research and Development Program, China (2016YFE0117900); Zhejiang Provincial Key Research and Development Program, China (2017C04001); Environmental Protection Agency (2018-RE-MS-13); Science Foundation Ireland (16/SP/3829); ERVIA and Gas Networks Ireland (Gas Innovation Group)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid119666en
dc.identifier.citationDing, L., Cheng, J., Lin, R., Deng, C., Zhou, J. and Murphy, J. D. (2019) 'Improving biohydrogen and biomethane co-production via two-stage dark fermentation and anaerobic digestion of the pretreated seaweed Laminaria digitata', Journal of Cleaner Production, 251, 119666 (11pp). doi: 10.1016/j.jclepro.2019.119666en
dc.identifier.doi10.1016/j.jclepro.2019.119666en
dc.identifier.eissn1879-1786
dc.identifier.endpage11en
dc.identifier.issn0959-6526
dc.identifier.journaltitleJournal of Cleaner Productionen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/9631
dc.identifier.volume251en
dc.language.isoenen
dc.publisherElsevier Ltd.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.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/S0959652619345366
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.subjectCascading bioenergy conversionen
dc.subjectDark fermentationen
dc.subjectBiohydrogen and biomethaneen
dc.subjectHydrothermal pretreatmenten
dc.subjectCarbohydrate monomeren
dc.titleImproving biohydrogen and biomethane co-production via two-stage dark fermentation and anaerobic digestion of the pretreated seaweed Laminaria digitataen
dc.typeArticle (peer-reviewed)en
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