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Enhancing microalgal biohydrogen production: Unlocking higher yields with hydrothermal pretreatment with niobium phosphate

2026-03Artigo científico Acesso aberto
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datacite.subject.fosEngenharia e Tecnologia::Engenharia Química
datacite.subject.fosEngenharia e Tecnologia::Outras Engenharias e Tecnologias
datacite.subject.sdg07:Energias Renováveis e Acessíveis
datacite.subject.sdg12:Produção e Consumo Sustentáveis
datacite.subject.sdg06:Água Potável e Saneamento
dc.contributor.authorSilva, Thiago
dc.contributor.authorJesus Junior, Maurino Magno
dc.contributor.authorNeves de Araujo, Matheus
dc.contributor.authorCastro, Laressa Santos
dc.contributor.authorFuess, Lucas Tadeu
dc.contributor.authorRodrigues, Fábio de Ávila
dc.contributor.authorZaiat, Marcelo
dc.contributor.authorReis, Alberto
dc.contributor.authorCalijuri, Maria Lucia
dc.date.accessioned2026-03-05T12:12:37Z
dc.date.available2026-03-05T12:12:37Z
dc.date.issued2026-03
dc.description.abstractABSTRACT: Microalgae cultivated in wastewater hold promise as a substrate for biohydrogen (bioH2) production. However, their rigid cell walls pose a challenge to fermentability. In this context, this study evaluated hydrothermal pretreatment with niobium phosphate (NbP) at 100-180 degrees C for 0-70 min, using up to 75 % NbP (relative to the dry weight of microalgal biomass). The hydrothermal pretreatment at 180 degrees C for 10 min with 75 % NbP released 7431 mg total carbohydrates (CHt) L-1, increasing the availability of fermentable substrates in subsequent dark fermentation (DF). When this pretreated biomass was subsequently fermented at pH 5.0 (sample PB5), bioH2 production reached 1.03 mmol H2 mol-1 CHt, with a maximum cumulative output of 0.17 mmol H2 and a CHt conversion efficiency of 83.6 %. In contrast, pH 5.5 and 6.0 reduced bioH2 yields and promoted methanogenic activity, while no pH control resulted in negligible bioH2 evolution. In conclusion, hydrothermal pretreatment with niobium phosphate and pH improvement synergize to enhance hydrogenogenesis, integrating wastewater treatment and renewable biohydrogen production.eng
dc.identifier.citationSilva, T., Jesus Junior, M., Araujo, M., Castro, L., Fuess, L., Rodrigues, F., Zaiat, M., Reis, A., & Calijuri, M. L. (2026). Enhancing microalgal biohydrogen production: Unlocking higher yields with hydrothermal pretreatment with niobium phosphate. In: Renewable Energy, 2026, vol. 259, article 125048. https://doi.org/10.1016/j.renene.2025.125048
dc.identifier.doi10.1016/j.renene.2025.125048
dc.identifier.eissn1879-0682
dc.identifier.issn0960-1481
dc.identifier.urihttp://hdl.handle.net/10400.9/6292
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relation.hasversionhttps://www.sciencedirect.com/science/article/pii/S0960148125027120?pes=vor&utm_source=clarivate&getft_integrator=clarivate
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectMicroalgae
dc.subjectBiomass valorisation
dc.subjectBiohydrogen
dc.subjectWastewater treatment
dc.titleEnhancing microalgal biohydrogen production: Unlocking higher yields with hydrothermal pretreatment with niobium phosphateeng
dc.typejournal article
dspace.entity.typePublication
oaire.citation.titleRenewable Energy
oaire.citation.volume259
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameSilva
person.familyNameJesus Junior
person.familyNameNeves de Araujo
person.familyNameFuess
person.familyNameReis
person.familyNameCalijuri
person.givenNameThiago
person.givenNameMaurino Magno
person.givenNameMatheus
person.givenNameLucas Tadeu
person.givenNameAlberto
person.givenNameMaria Lucia
person.identifier.orcid0000-0002-6108-8793
person.identifier.orcid0000-0003-3943-0641
person.identifier.orcid0000-0003-4492-3037
person.identifier.orcid0000-0001-8520-1124
person.identifier.orcid0000-0002-1405-9981
person.identifier.orcid0000-0002-0918-2475
person.identifier.ridG-1546-2012
person.identifier.scopus-author-id57218439017
person.identifier.scopus-author-id57204744399
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relation.isAuthorOfPublicationf0af6519-ace2-4be7-a594-3f2d61a32b38
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relation.isAuthorOfPublication.latestForDiscoveryc5ea1931-1fa0-43b8-b476-af1256cdeb2c

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