Water sorption properties of brewer's spent grain: A study aimed at its stabilization for further conversion into value-added products
Autor(a) principal: | |
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Data de Publicação: | 2023 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.biombioe.2023.106718 http://hdl.handle.net/11449/248296 |
Resumo: | Due to its high moisture content and perishability, the water adsorption isotherms, and thermodynamic properties of brewer's spent grain obtained from barley malt (BSGL) and wheat malt based (BSGW) were evaluated under storage and drying conditions. Chemically characterized BSGs were subjected to the static gravimetric method to experimentally obtain the water adsorption isotherms at ten temperatures (5–90 °C). As the best-fitted model (R2adj > 0.9928 e χ2 ≤ 0.0001), the GAB parameters were used to determine the adsorption surface area, spreading pressure, and thermodynamic properties. At temperatures from 5 to 50 °C, the adsorption isotherms of BSGL and BSGW showed convex curves, typical of type III isotherms. However, at temperatures above 60 °C, the curves started to present typical type II isotherms with sigmoid-shaped sorption behavior. The equilibrium moisture content of BSGs increased with increasing relative humidity and/or decreasing temperature. The spreading pressure increased as the water activity and temperature increased, contrary to that observed for the adsorption surface area. Thermodynamic analysis showed that the net isosteric heat of adsorption, enthalpy, and differential entropy decreased as the equilibrium moisture increased. The compensation theory was confirmed, and its results indicated that the adsorption processes were enthalpy-driven. The positive values for Gibbs free energy indicated that the adsorption processes were not spontaneous, which may be related to the composition of BSGs in terms of lipids and proteins. From an energy and stability point of view, a water activity of 0.4 is the ideal condition for the storage of BSGs. |
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Water sorption properties of brewer's spent grain: A study aimed at its stabilization for further conversion into value-added productsAgro-industrial byproductLignocellulosic biomassModel fittingProteinSorption isothermStabilizationDue to its high moisture content and perishability, the water adsorption isotherms, and thermodynamic properties of brewer's spent grain obtained from barley malt (BSGL) and wheat malt based (BSGW) were evaluated under storage and drying conditions. Chemically characterized BSGs were subjected to the static gravimetric method to experimentally obtain the water adsorption isotherms at ten temperatures (5–90 °C). As the best-fitted model (R2adj > 0.9928 e χ2 ≤ 0.0001), the GAB parameters were used to determine the adsorption surface area, spreading pressure, and thermodynamic properties. At temperatures from 5 to 50 °C, the adsorption isotherms of BSGL and BSGW showed convex curves, typical of type III isotherms. However, at temperatures above 60 °C, the curves started to present typical type II isotherms with sigmoid-shaped sorption behavior. The equilibrium moisture content of BSGs increased with increasing relative humidity and/or decreasing temperature. The spreading pressure increased as the water activity and temperature increased, contrary to that observed for the adsorption surface area. Thermodynamic analysis showed that the net isosteric heat of adsorption, enthalpy, and differential entropy decreased as the equilibrium moisture increased. The compensation theory was confirmed, and its results indicated that the adsorption processes were enthalpy-driven. The positive values for Gibbs free energy indicated that the adsorption processes were not spontaneous, which may be related to the composition of BSGs in terms of lipids and proteins. From an energy and stability point of view, a water activity of 0.4 is the ideal condition for the storage of BSGs.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)European CommissionEuropean Regional Development FundFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Food Engineering and Technology Department São Paulo State University Institute of Biosciences Humanities and Exact Sciences (Ibilce), Campus São José do Rio PretoUniversité Paris-Saclay CentraleSupélec Laboratoire de Génie des Procédés et Matériaux SFR Condorcet FR CNRS 3417 Centre Européen de Biotechnologie et de Bioéconomie (CEBB), 3 rue des Rouges TerresFood Engineering and Technology Department São Paulo State University Institute of Biosciences Humanities and Exact Sciences (Ibilce), Campus São José do Rio PretoFAPESP: 2022/05272-8Universidade Estadual Paulista (UNESP)Centre Européen de Biotechnologie et de Bioéconomie (CEBB)Sanches, Marcio Augusto Ribeiro [UNESP]Augusto, Pedro Esteves DuartePolachini, Tiago Carregari [UNESP]Telis-Romero, Javier [UNESP]2023-07-29T13:39:57Z2023-07-29T13:39:57Z2023-03-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.biombioe.2023.106718Biomass and Bioenergy, v. 170.1873-29090961-9534http://hdl.handle.net/11449/24829610.1016/j.biombioe.2023.1067182-s2.0-85147229370Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengBiomass and Bioenergyinfo:eu-repo/semantics/openAccess2023-07-29T13:39:57Zoai:repositorio.unesp.br:11449/248296Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-07-29T13:39:57Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Water sorption properties of brewer's spent grain: A study aimed at its stabilization for further conversion into value-added products |
title |
Water sorption properties of brewer's spent grain: A study aimed at its stabilization for further conversion into value-added products |
spellingShingle |
Water sorption properties of brewer's spent grain: A study aimed at its stabilization for further conversion into value-added products Sanches, Marcio Augusto Ribeiro [UNESP] Agro-industrial byproduct Lignocellulosic biomass Model fitting Protein Sorption isotherm Stabilization |
title_short |
Water sorption properties of brewer's spent grain: A study aimed at its stabilization for further conversion into value-added products |
title_full |
Water sorption properties of brewer's spent grain: A study aimed at its stabilization for further conversion into value-added products |
title_fullStr |
Water sorption properties of brewer's spent grain: A study aimed at its stabilization for further conversion into value-added products |
title_full_unstemmed |
Water sorption properties of brewer's spent grain: A study aimed at its stabilization for further conversion into value-added products |
title_sort |
Water sorption properties of brewer's spent grain: A study aimed at its stabilization for further conversion into value-added products |
author |
Sanches, Marcio Augusto Ribeiro [UNESP] |
author_facet |
Sanches, Marcio Augusto Ribeiro [UNESP] Augusto, Pedro Esteves Duarte Polachini, Tiago Carregari [UNESP] Telis-Romero, Javier [UNESP] |
author_role |
author |
author2 |
Augusto, Pedro Esteves Duarte Polachini, Tiago Carregari [UNESP] Telis-Romero, Javier [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) Centre Européen de Biotechnologie et de Bioéconomie (CEBB) |
dc.contributor.author.fl_str_mv |
Sanches, Marcio Augusto Ribeiro [UNESP] Augusto, Pedro Esteves Duarte Polachini, Tiago Carregari [UNESP] Telis-Romero, Javier [UNESP] |
dc.subject.por.fl_str_mv |
Agro-industrial byproduct Lignocellulosic biomass Model fitting Protein Sorption isotherm Stabilization |
topic |
Agro-industrial byproduct Lignocellulosic biomass Model fitting Protein Sorption isotherm Stabilization |
description |
Due to its high moisture content and perishability, the water adsorption isotherms, and thermodynamic properties of brewer's spent grain obtained from barley malt (BSGL) and wheat malt based (BSGW) were evaluated under storage and drying conditions. Chemically characterized BSGs were subjected to the static gravimetric method to experimentally obtain the water adsorption isotherms at ten temperatures (5–90 °C). As the best-fitted model (R2adj > 0.9928 e χ2 ≤ 0.0001), the GAB parameters were used to determine the adsorption surface area, spreading pressure, and thermodynamic properties. At temperatures from 5 to 50 °C, the adsorption isotherms of BSGL and BSGW showed convex curves, typical of type III isotherms. However, at temperatures above 60 °C, the curves started to present typical type II isotherms with sigmoid-shaped sorption behavior. The equilibrium moisture content of BSGs increased with increasing relative humidity and/or decreasing temperature. The spreading pressure increased as the water activity and temperature increased, contrary to that observed for the adsorption surface area. Thermodynamic analysis showed that the net isosteric heat of adsorption, enthalpy, and differential entropy decreased as the equilibrium moisture increased. The compensation theory was confirmed, and its results indicated that the adsorption processes were enthalpy-driven. The positive values for Gibbs free energy indicated that the adsorption processes were not spontaneous, which may be related to the composition of BSGs in terms of lipids and proteins. From an energy and stability point of view, a water activity of 0.4 is the ideal condition for the storage of BSGs. |
publishDate |
2023 |
dc.date.none.fl_str_mv |
2023-07-29T13:39:57Z 2023-07-29T13:39:57Z 2023-03-01 |
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://dx.doi.org/10.1016/j.biombioe.2023.106718 Biomass and Bioenergy, v. 170. 1873-2909 0961-9534 http://hdl.handle.net/11449/248296 10.1016/j.biombioe.2023.106718 2-s2.0-85147229370 |
url |
http://dx.doi.org/10.1016/j.biombioe.2023.106718 http://hdl.handle.net/11449/248296 |
identifier_str_mv |
Biomass and Bioenergy, v. 170. 1873-2909 0961-9534 10.1016/j.biombioe.2023.106718 2-s2.0-85147229370 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Biomass and Bioenergy |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1792962196121059328 |