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Xylitol Production by Debaryomyces hansenii in Extracted Olive Pomace Dilute-Acid Hydrolysate

2023-12Journal article Open access
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dc.contributor.authorMorais, Ana Rita C.
dc.contributor.authorDuarte, Luís C.
dc.contributor.authorLourenço, Pedro
dc.contributor.authorTorrado, Ivone
dc.contributor.authorBrás, Teresa
dc.contributor.authorNeves, Luísa, A.
dc.contributor.authorCarvalheiro, Florbela
dc.date.accessioned2024-01-31T10:13:11Z
dc.date.available2024-01-31T10:13:11Z
dc.date.issued2023-12
dc.description.abstractABSTRACT: The extracted olive pomace (EOP) is an industrial lignocellulosic by-product of olive pomace oil extraction, currently mainly used for energy production through combustion. In this work, the hemicellulosic fraction of EOP was selectively hydrolyzed by diluted acid hydrolysis to obtain pentose-rich hydrolysates that can potentially be upgraded by Debaryomyces hansenii, targeting xylitol production. The monosaccharides and degradation by-products released along the pre-treatment were quantified and several detoxification methods for the removal of potentially toxic compounds were evaluated, including pH adjustment to 5.5, the use of anion-exchange resins, adsorption into activated charcoal, concentration by evaporation, and membrane techniques, i.e., nanofiltration. The latter approach was shown to be the best method allowing the full removal of furfural, 41% of 5-hydroxymethylfurfural, 54% of acetic acid, and 67% of the phenolic compounds present in the hydrolysate. The effects of the supplementation of both non-detoxified and detoxified hydrolysates were also assessed. The non-detoxified hydrolysate, under aerobic conditions, supported the yeast growth and xylitol production at low levels. Supplementation with the low-cost corn steep liquor of the nanofiltration detoxified hydrolysate showed a higher xylitol yield (0.57 g/g) compared to the non-detoxified hydrolysate. The highest xylitol productivity was found in hydrolysate detoxified with anionic resins (0.30 g/L-h), which was 80% higher than in the non-detoxified culture medium. Overall, the results showed that EOP dilute acid hydrolysates can efficiently be used for xylitol production by D. hansenii if detoxification, and supplementation, even with low-cost supplements, are performed.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationMorais, Ana Rita C... et.al - Xylitol Production by Debaryomyces hansenii in Extracted Olive Pomace Dilute-Acid Hydrolysate. In: Fermentation-Basel, 2023, vol. 9 (12), article nº 1020pt_PT
dc.identifier.doi10.3390/fermentation9121020pt_PT
dc.identifier.eissn2311-5637
dc.identifier.urihttp://hdl.handle.net/10400.9/4237
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherMDPIpt_PT
dc.relationFCOMP-01-0202-FEDER-005450pt_PT
dc.relationBiomass and Bioenergy Research Infrastructure
dc.relation.publisherversionhttps://doi.org/10.3390/fermentation9121020pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectXylitolpt_PT
dc.subjectOlive pomacept_PT
dc.subjectHemicellulosic hydrolysatespt_PT
dc.subjectDetoxificationpt_PT
dc.titleXylitol Production by Debaryomyces hansenii in Extracted Olive Pomace Dilute-Acid Hydrolysatept_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleBiomass and Bioenergy Research Infrastructure
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/9444 - RNIIIE/PINFRA%2F22059%2F2016/PT
oaire.citation.titleFermentation-Baselpt_PT
oaire.citation.volume9pt_PT
oaire.fundingStream9444 - RNIIIE
person.familyNameMorais
person.familyNameDuarte
person.familyNameTorrado
person.familyNameNeves
person.familyNameCarvalheiro
person.givenNameAna
person.givenNameLuís
person.givenNameIvone
person.givenNameLuísa
person.givenNameFlorbela
person.identifier59799
person.identifier669975
person.identifier.ciencia-id7F15-9BC9-79AA
person.identifier.ciencia-idA219-EFE5-D4BB
person.identifier.ciencia-id2218-0B4E-1582
person.identifier.ciencia-id4016-9476-B97D
person.identifier.orcid0000-0002-3216-1533
person.identifier.orcid0000-0001-5820-3669
person.identifier.orcid0000-0002-9106-6923
person.identifier.orcid0000-0002-9620-6286
person.identifier.orcid0000-0002-0270-4832
person.identifier.ridJ-9490-2013
person.identifier.ridC-1430-2008
person.identifier.ridE-5462-2013
person.identifier.ridL-1860-2014
person.identifier.scopus-author-id56649966600
person.identifier.scopus-author-id7004110564
person.identifier.scopus-author-id6603247136
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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