Improving gaseous biofuel production from seaweed Saccharina latissima: the effect of hydrothermal pretreatment on energy efficiency

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dc.contributor.author Lin, Richen
dc.contributor.author Deng, Chen
dc.contributor.author Ding, Lingkan
dc.contributor.author Bose, Archishman
dc.contributor.author Murphy, Jerry D.
dc.date.accessioned 2019-07-18T11:07:47Z
dc.date.available 2019-07-18T11:07:47Z
dc.date.issued 2019-07-08
dc.identifier.citation Lin, R., Deng, C., Ding, L., Bose, A. and Murphy, J. D. (2019) 'Improving gaseous biofuel production from seaweed Saccharina latissima: the effect of hydrothermal pretreatment on energy efficiency', Energy Conversion and Management, 196, pp. 1385-1394. doi: 10.1016/j.enconman.2019.06.044 en
dc.identifier.volume 196 en
dc.identifier.startpage 1385 en
dc.identifier.endpage 1394 en
dc.identifier.issn 0196-8904
dc.identifier.uri http://hdl.handle.net/10468/8198
dc.identifier.doi 10.1016/j.enconman.2019.06.044 en
dc.description.abstract Marine macroalgae (seaweed) is a promising feedstock for producing biohydrogen and biomethane via dark fermentation and anaerobic digestion, respectively. However, one of the limiting steps in the biological process is the conversion of polymeric carbohydrates into monomeric sugars. Here hydrothermal pretreatments were assessed for hydrolysis and subsequent production of biohydrogen and biomethane from the brown seaweed Saccharina latissima. The solubilization of S. latissima improved with increasing temperatures from 100 to 180 °C, resulting in a maximum yield of 0.70 g soluble chemical oxygen demand/gram volatile solid (sCOD/g VS); equivalent to an increase of 207.5% compared with untreated seaweed. However, the yield of the derived monomeric sugar mannitol peaked at 140 °C and decreased with increasing temperatures, likely due to production of fermentative inhibitors. Microstructural characterization revealed that the algal structure was significantly damaged, and the major chemical groups of carbohydrates and proteins were weakened after pretreatment. Regardless of hydrothermal temperatures, biohydrogen yield only slightly increased in dark fermentation, while biomethane yield significantly increased from 281.4 (untreated S. latissima) to 345.1 mL/g VS (treated at 140 °C), leading to the sCOD removal efficiency of 86.1%. The maximum energy conversion efficiency of 72.8% was achieved after two-stage biohydrogen and biomethane co-production. In comparison, considering the energy input for pretreatment/fermentation/digestion, the highest process energy efficiency dropped to 37.8%. Further calculations suggest that a significant improvement of efficiency up to 56.9% can be achieved if the heat from pretreatment can be recovered. en
dc.description.sponsorship Environmental Protection Agency (2018-RE-MS-13); Science Foundation Ireland (16/SP/3829) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Elsevier Ltd. en
dc.relation.uri http://www.sciencedirect.com/science/article/pii/S0196890419307150
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.uri https://creativecommons.org/licenses/by-nc-nd/4.0/ en
dc.subject Macroalgae en
dc.subject Hydrothermal pretreatment en
dc.subject Energy efficiency en
dc.subject Biohydrogen en
dc.subject Biomethane en
dc.title Improving gaseous biofuel production from seaweed Saccharina latissima: the effect of hydrothermal pretreatment on energy efficiency en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Chen Deng, Eri, University College Cork, Cork, Ireland. +353-21-490-3000 Email: chen.deng@ucc.ie en
dc.internal.availability Full text available en
dc.check.info Access to this article is restricted until 24 months after publication by request of the publisher. en
dc.check.date 2021-07-08
dc.date.updated 2019-07-18T10:58:58Z
dc.description.version Accepted Version en
dc.internal.rssid 493288132
dc.contributor.funder Horizon 2020 en
dc.contributor.funder Environmental Protection Agency en
dc.contributor.funder Science Foundation Ireland en
dc.contributor.funder Ervia, Ireland en
dc.contributor.funder Gas Networks Ireland en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Energy Conversion and Management en
dc.internal.copyrightchecked Yes
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress chen.deng@ucc.ie en
dc.relation.project info: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/DIET en
dc.relation.project info: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


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© 2019, Elsevier Ltd. All rights reserved. This manuscript version is made available under the CC BY-NC-ND 4.0 license. Except where otherwise noted, this item's license is described as © 2019, Elsevier Ltd. All rights reserved. This manuscript version is made available under the CC BY-NC-ND 4.0 license.
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