Improving biohydrogen and biomethane co-production via two-stage dark fermentation and anaerobic digestion of the pretreated seaweed Laminaria digitata
dc.contributor.author | Ding, Lingkan | |
dc.contributor.author | Cheng, Jun | |
dc.contributor.author | Lin, Richen | |
dc.contributor.author | Deng, Chen | |
dc.contributor.author | Zhou, Junhu | |
dc.contributor.author | Murphy, Jerry D. | |
dc.contributor.funder | National Key Research and Development Program, China | en |
dc.contributor.funder | Zhejiang Provincial Key Research and Development Program, China | en |
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.date.accessioned | 2020-02-11T13:07:53Z | |
dc.date.available | 2020-02-11T13:07:53Z | |
dc.date.issued | 2019-12-11 | |
dc.date.updated | 2020-02-11T12:33:19Z | |
dc.description.abstract | The 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.sponsorship | National 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.status | Peer reviewed | en |
dc.description.version | Accepted Version | en |
dc.format.mimetype | application/pdf | en |
dc.identifier.articleid | 119666 | en |
dc.identifier.citation | Ding, 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.2019.119666 | en |
dc.identifier.doi | 10.1016/j.jclepro.2019.119666 | en |
dc.identifier.eissn | 1879-1786 | |
dc.identifier.endpage | 11 | en |
dc.identifier.issn | 0959-6526 | |
dc.identifier.journaltitle | Journal of Cleaner Production | en |
dc.identifier.startpage | 1 | en |
dc.identifier.uri | https://hdl.handle.net/10468/9631 | |
dc.identifier.volume | 251 | en |
dc.language.iso | en | en |
dc.publisher | Elsevier Ltd. | 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 |
dc.relation.uri | http://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.uri | https://creativecommons.org/licenses/by-nc-nd/4.0/ | en |
dc.subject | Cascading bioenergy conversion | en |
dc.subject | Dark fermentation | en |
dc.subject | Biohydrogen and biomethane | en |
dc.subject | Hydrothermal pretreatment | en |
dc.subject | Carbohydrate monomer | en |
dc.title | Improving biohydrogen and biomethane co-production via two-stage dark fermentation and anaerobic digestion of the pretreated seaweed Laminaria digitata | en |
dc.type | Article (peer-reviewed) | en |