An integrated olive stone biorefinery based on a two-step fractionation strategy
Autor(a) principal: | |
---|---|
Data de Publicação: | 2022 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.9/3976 |
Resumo: | ABSTRACT: 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. |
id |
RCAP_70b7cc2c595779094a7ec187d435b8fe |
---|---|
oai_identifier_str |
oai:repositorio.lneg.pt:10400.9/3976 |
network_acronym_str |
RCAP |
network_name_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository_id_str |
|
spelling |
An integrated olive stone biorefinery based on a two-step fractionation strategyBioethanolBiomass Pre-treatmentOlive oilLignocellulosic biomassOrganosolv processABSTRACT: 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.ElsevierRepositório do LNEGPadilla-Rascón, CarmenCarvalheiro, FlorbelaDuarte, Luís C.Roseiro, Luisa B.Ruiz, EncarnaciónCastro, Eulogio2022-12-14T15:48:54Z2022-112022-11-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.9/3976engPadilla-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 1151570926-669010.1016/j.indcrop.2022.1151571872-633Xinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-12-18T04:48:32ZPortal AgregadorONG |
dc.title.none.fl_str_mv |
An integrated olive stone biorefinery based on a two-step fractionation strategy |
title |
An integrated olive stone biorefinery based on a two-step fractionation strategy |
spellingShingle |
An integrated olive stone biorefinery based on a two-step fractionation strategy Padilla-Rascón, Carmen Bioethanol Biomass Pre-treatment Olive oil Lignocellulosic biomass Organosolv process |
title_short |
An integrated olive stone biorefinery based on a two-step fractionation strategy |
title_full |
An integrated olive stone biorefinery based on a two-step fractionation strategy |
title_fullStr |
An integrated olive stone biorefinery based on a two-step fractionation strategy |
title_full_unstemmed |
An integrated olive stone biorefinery based on a two-step fractionation strategy |
title_sort |
An integrated olive stone biorefinery based on a two-step fractionation strategy |
author |
Padilla-Rascón, Carmen |
author_facet |
Padilla-Rascón, Carmen Carvalheiro, Florbela Duarte, Luís C. Roseiro, Luisa B. Ruiz, Encarnación Castro, Eulogio |
author_role |
author |
author2 |
Carvalheiro, Florbela Duarte, Luís C. Roseiro, Luisa B. Ruiz, Encarnación Castro, Eulogio |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Repositório do LNEG |
dc.contributor.author.fl_str_mv |
Padilla-Rascón, Carmen Carvalheiro, Florbela Duarte, Luís C. Roseiro, Luisa B. Ruiz, Encarnación Castro, Eulogio |
dc.subject.por.fl_str_mv |
Bioethanol Biomass Pre-treatment Olive oil Lignocellulosic biomass Organosolv process |
topic |
Bioethanol Biomass Pre-treatment Olive oil Lignocellulosic biomass Organosolv process |
description |
ABSTRACT: 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. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-12-14T15:48:54Z 2022-11 2022-11-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.9/3976 |
url |
http://hdl.handle.net/10400.9/3976 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Padilla-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 115157 0926-6690 10.1016/j.indcrop.2022.115157 1872-633X |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
|
repository.mail.fl_str_mv |
|
_version_ |
1777301621697413120 |