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An integrated olive stone biorefinery based on a two-step fractionation strategy

2022-11Journal article Open access
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dc.contributor.authorPadilla-Rascón, Carmen
dc.contributor.authorCarvalheiro, Florbela
dc.contributor.authorDuarte, Luís C.
dc.contributor.authorRoseiro, Luisa B.
dc.contributor.authorRuiz, Encarnación
dc.contributor.authorCastro, Eulogio
dc.date.accessioned2022-12-14T15:48:54Z
dc.date.available2022-12-14T15:48:54Z
dc.date.issued2022-11
dc.description.abstractABSTRACT: Olive stones (OS) constitute a waste lignocellulosic material produced by the olive oil industry in great amounts, that currently is only used as a low-value energy source for industrial or domestic boilers. Having in view its full valorization, this work proposes and validates an integrated strategy aiming to obtain three different streams of sugars / lignin-derived compounds. Dilute acid hydrolysis was used to obtain a xylose-rich hydroysate that was chemically converted into furfural with a 48.7 % yield. The resulting acid-pretreated solid biomass that consisted mainly of lignin and cellulose, was subjected to a catalyzed ethanol-based organosolv delignification. Temperature, time, and sulphuric acid concentration were optimized in order to recover added-value lignin products and digestible cellulose. At the optimal conditions (190 degrees C and 30 min), a 50 % delignification was reached, together with the highest enzymatic hydrolysis yields (190 g glucose/kg of OS). Phenolic compounds content in organosolv liquors reached 41.6 mg GAE/g OS. This extract presented an antioxidant capacity up to 10.9 mg TE/g OS. The pretreated solid fraction was used as a substrate for ethanol production by a pre-saccharification and simultaneous saccharification and fermentation process, enabling to obtain an ethanol concentration of 47 g/L, with a fermentation yield of 61.4 % of the theoretical maximum. Globally, from 100 kg of OS processed according to this experimental scheme, 6.9 kg of furfural, 6.2 kg of ethanol, 7.4 kg of lignin, and 4.2 kg of phenolics compounds can be obtained as main products, thus constituting a way of valorization of renewable material in a multiproduct biorefinery strategy.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationPadilla-Rascón, Carmen... [et.al.] - An integrated olive stone biorefinery based on a two-step fractionation strategy. In: Industrial Crops and Products, 2022, vol. 187, article nº 115157pt_PT
dc.identifier.doi10.1016/j.indcrop.2022.115157pt_PT
dc.identifier.eissn1872-633X
dc.identifier.issn0926-6690
dc.identifier.urihttp://hdl.handle.net/10400.9/3976
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationBiofuels Research Infrastructure for Sharing Knowledge II
dc.relationBiomass and Bioenergy Research Infrastructure
dc.relation.publisherversionhttps://doi.org/10.1016/j.indcrop.2022.115157pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectBioethanolpt_PT
dc.subjectBiomass Pre-treatmentpt_PT
dc.subjectOlive oilpt_PT
dc.subjectLignocellulosic biomasspt_PT
dc.subjectOrganosolv processpt_PT
dc.titleAn integrated olive stone biorefinery based on a two-step fractionation strategypt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleBiofuels Research Infrastructure for Sharing Knowledge II
oaire.awardTitleBiomass and Bioenergy Research Infrastructure
oaire.awardURIinfo:eu-repo/grantAgreement/EC/H2020/731101/EU
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/9444 - RNIIIE/PINFRA%2F22059%2F2016/PT
oaire.citation.titleIndustrial Crops and Productspt_PT
oaire.citation.volume187pt_PT
oaire.fundingStreamH2020
oaire.fundingStream9444 - RNIIIE
person.familyNameCarvalheiro
person.familyNameDuarte
person.familyNamede Bivar Weinholtz Roseiro
person.familyNameCastro Galiano
person.givenNameFlorbela
person.givenNameLuís
person.givenNameMaria Luisa
person.givenNameEulogio
person.identifier59799
person.identifier.ciencia-id4016-9476-B97D
person.identifier.ciencia-id7F15-9BC9-79AA
person.identifier.ciencia-idF71F-0B5C-AE27
person.identifier.orcid0000-0002-0270-4832
person.identifier.orcid0000-0001-5820-3669
person.identifier.orcid0000-0003-1562-6658
person.identifier.orcid0000-0003-1719-6049
person.identifier.ridL-1860-2014
person.identifier.ridC-1430-2008
person.identifier.ridL-1101-2014
person.identifier.ridE-5910-2011
person.identifier.scopus-author-id6603247136
person.identifier.scopus-author-id56649966600
person.identifier.scopus-author-id6602749883
person.identifier.scopus-author-id7102441948
project.funder.identifierhttp://doi.org/10.13039/501100008530
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameEuropean Commission
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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