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Enhancing the Biorefinery of Chestnut Burrs, Part II: Influence of Pretreatment with Choline Chloride–Urea-Diluted Deep Eutectic Solvent on Enzymatic Hydrolysis

2025-12Artigo científico Acesso aberto
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datacite.subject.fosEngenharia e Tecnologia::Engenharia Química
datacite.subject.fosEngenharia e Tecnologia::Engenharia dos Materiais
datacite.subject.sdg12:Produção e Consumo Sustentáveis
dc.contributor.authorCosta Trigo, Iván
dc.contributor.authorMoran, Guadalupe
dc.contributor.authorPérez Guerra, Nelson
dc.contributor.authorOliveira, Ricardo
dc.contributor.authorDomínguez, José Manuel
dc.date.accessioned2026-01-16T15:32:59Z
dc.date.available2026-01-16T15:32:59Z
dc.date.issued2025-12
dc.description.abstractABSTRACT: Agro-industrial chestnut waste derived from chestnut processing is usually discharged without further use. However, these residues are attractive due to their high-value composition, rich in sugars and lignin. Among these residues, chestnut burrs (CB) represent a promising feedstock for biorefinery applications aimed at maximizing the valorization of their main constituents. In this study, we propose an environmentally friendly approach based on deep eutectic solvents (DES) formed by choline chloride and urea (ChCl/U) (1:2, mol/mol) for the selective deconstruction of lignocellulosic architecture, followed by enzymatic hydrolysis to release second-generation (2G) fermentable sugars. Pretreatments were applied to raw CB, washed CB (W-CB), and the obtained solid fraction after prehydrolysis (PreH). Structural and morphological modifications, as well as crystallinity induced by DES pretreatment, were characterized using attenuated total reflectance Fourier-transform infrared spectroscopy (ATR-FTIR), field emission scanning electron microscopy (FE-SEM), and X-ray diffraction (XRD). Remarkable results in terms of effectiveness and environmental friendliness on saccharification yields were achieved for PreH subjected to DES treatment for 8 h, reaching approximately 60% glucan and 74% xylan conversion under the lower enzyme loading (23 FPU/g) and liquid-to-solid ratio (LSR) of 20:1 studied. This performance significantly reduces DES pretreatment time from 16 h to 8 h at mild conditions (100 degrees C), lowers the LSR for enzymatic hydrolysis from 30:1 to 20:1, and decreases enzyme loading from 63.5 FPU/g to 23 FPU/g, therefore improving process efficiency and sustainability.eng
dc.identifier.citationCosta-Trigo, I., Morán-Aguilar, M. G., Pérez Guerra, N., Oliveira, R., & Domínguez, J. M. (2025). Enhancing the Biorefinery of Chestnut Burrs, Part II: Influence of Pretreatment with Choline Chloride–Urea-Diluted Deep Eutectic Solvent on Enzymatic Hydrolysis. In: Processes, vol. 13(12), article 4090. https://doi.org/10.3390/pr13124090
dc.identifier.doi10.3390/pr13124090
dc.identifier.eissn2227-9717
dc.identifier.urihttp://hdl.handle.net/10400.9/6204
dc.language.isoeng
dc.peerreviewedyes
dc.publisherMDPI
dc.relation.hasversionhttps://www.mdpi.com/2227-9717/13/12/4090
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectLignocellulosic biomass
dc.subjectChestnut burrs
dc.subjectBiorefinery
dc.subjectPretreatments
dc.subjectEnzymatic hydrolysis
dc.titleEnhancing the Biorefinery of Chestnut Burrs, Part II: Influence of Pretreatment with Choline Chloride–Urea-Diluted Deep Eutectic Solvent on Enzymatic Hydrolysiseng
dc.typejournal article
dspace.entity.typePublication
oaire.citation.issue12
oaire.citation.titleProcesses
oaire.citation.volume13
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameCosta Trigo
person.familyNameMoran
person.familyNamePérez Guerra
person.familyNameOliveira
person.familyNameDomínguez
person.givenNameIván
person.givenNameGuadalupe
person.givenNameNelson
person.givenNameRicardo
person.givenNameJosé Manuel
person.identifier.orcid0000-0002-1277-464X
person.identifier.orcid0000-0002-8850-4048
person.identifier.orcid0000-0002-8202-932X
person.identifier.orcid0000-0001-8590-804X
person.identifier.orcid0000-0003-2260-3438
relation.isAuthorOfPublicatione295b684-fa39-4828-8ea9-d6e526857d21
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relation.isAuthorOfPublicationed5955f4-7c39-4492-8035-410a78a142e1
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relation.isAuthorOfPublication05bf4d2e-601f-404d-8c34-5221c73d706b
relation.isAuthorOfPublication.latestForDiscoverye295b684-fa39-4828-8ea9-d6e526857d21

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