Please use this identifier to cite or link to this item:
Full metadata record
DC FieldValueLanguage
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.identifier.citationIndustrial Crops and Products (2022), 187, 115157es_ES
dc.description.abstractOlive 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 ᵒC 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.es_ES
dc.relation.ispartofIndustrial Crops and Products (2022), 187, 115157es_ES
dc.rightsCC0 1.0 Universal*
dc.subjectBiomass pretreatmentes_ES
dc.subjectEtahnol-water organosolves_ES
dc.subjectLignin-derived productses_ES
dc.subjectOlive oil industrial wastees_ES
dc.titleAn integrated olive stone biorefinery based on a 1 two-step fractionation strategyes_ES
Appears in Collections:DIQAM-Artículos

Files in This Item:
File Description SizeFormat 
An integrated olive stone version aceptada.pdfVersión aceptada625,86 kBAdobe PDFView/Open

This item is protected by original copyright