Enzymatic production of cellulose nanofibers and sugars in a stirred-tank reactor: determination of impeller speed, power consumption, and rheological behavior

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorBondancia, Thalita J.-
Autor(es): dc.creatorCorrêa, Luciano J.-
Autor(es): dc.creatorCruz, Antonio J. G.-
Autor(es): dc.creatorBadino, Alberto C.-
Autor(es): dc.creatorMattoso, Luiz Henrique C.-
Autor(es): dc.creatorMarconcini, José Manoel-
Autor(es): dc.creatorFarinas, Cristiane S.-
Data de aceite: dc.date.accessioned2026-02-09T11:56:27Z-
Data de disponibilização: dc.date.available2026-02-09T11:56:27Z-
Data de envio: dc.date.issued2019-05-13-
Data de envio: dc.date.issued2019-05-13-
Data de envio: dc.date.issued2018-08-
Fonte completa do material: dc.identifierhttps://repositorio.ufla.br/handle/1/34254-
Fonte completa do material: dc.identifierhttps://link.springer.com/article/10.1007/s10570-018-1876-2-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1150819-
Descrição: dc.descriptionAn integrated biorefinery process is proposed here for the enzymatic production of cellulose nanofiber (CNF) and sugars in a stirred-tank reactor using eucalyptus cellulose pulp as feedstock. Process engineering variables required for scale-up such as impeller speed, power consumption, and rheological behavior were determined under different experimental conditions of solids loading (10 and 15% w/v) and enzyme dosage (5 and 10 mg/g). Based on the mixing time, an impeller speed rotation of 470 rpm was selected for provision of adequate homogenization of the medium. Total energy consumption ranged from 161 to 207 W h and showed that significantly lower power consumption could be achieved using 10 mg/g enzyme loading with 10% w/v solids. Evaluation of rheological behavior showed that transition to a turbulent flow regime during the enzymatic hydrolysis reaction resulted in a constant power number ranging from 2.06 to 2.51, which was also lower for 10 mg/g enzyme loading with 10% w/v solids. Integrated analysis of glucose released and CNF generated after enzymatic hydrolysis showed that glucose values varied from 42.0 to 90.6 g/L, corresponding to cellulose conversion ranging from 57.2 to 76.4%. These values are suitable for the microbial fermentation of sugars into biofuels, while leaving a useful amount of residual nanomaterial. The residual solids of the enzymatic reactions presented the characteristics of CNF, as shown by X-ray diffraction (XRD) analyses, with crystallinity index (CI) values of 72–81%, as well as by morphological analysis using field emission scanning electron microscopy (FEG-SEM), which revealed diameters in the range 18–31 nm, making this nanomaterial suitable for use in a wide range of industrial applications. The findings indicated the potential of using conventional stirred-tank reactors for enzymatic hydrolysis for the integrated production of CNF and glucose, hence contributing to the implementation of future large-scale biorefineries.-
Idioma: dc.languageen-
Publicador: dc.publisherSpringer-
Direitos: dc.rightsrestrictAccess-
???dc.source???: dc.sourceCellulose-
Palavras-chave: dc.subjectNanocellulose-
Palavras-chave: dc.subjectCellulose nanofiber-
Palavras-chave: dc.subjectCellulosic ethanol-
Palavras-chave: dc.subjectBiorefinery-
Palavras-chave: dc.subjectEnzymatic hydrolysis-
Palavras-chave: dc.subjectScale-up parameters-
Título: dc.titleEnzymatic production of cellulose nanofibers and sugars in a stirred-tank reactor: determination of impeller speed, power consumption, and rheological behavior-
Tipo de arquivo: dc.typeArtigo-
Aparece nas coleções:Repositório Institucional da Universidade Federal de Lavras (RIUFLA)

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