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dc.contributor.authorDiop, Cherif Ibrahima Khalil 
dc.contributor.authorTrigueros Andrés, Ester 
dc.contributor.authorSanz Díez, Mª Teresa 
dc.contributor.authorBeltrán Calvo, Sagrario 
dc.contributor.authorGarcía Tojal, Javier 
dc.date.accessioned2022-03-21T14:01:48Z
dc.date.available2022-03-21T14:01:48Z
dc.date.issued2022-08
dc.identifier.issn0268-005X
dc.identifier.urihttp://hdl.handle.net/10259/6480
dc.description.abstractThe potential of using pressurized hot water extraction to valorize the remaining crude agar in Gelidium sesquipedale waste stream after an initial industrial extraction was investigated. In this process, a four-factor Box-Behnken design was coupled with a response surface methodology. The impact of the operating temperature (°C), the internal pressure (bar), the extraction time (min), and the algae concentration (% w: v), as well as their quadratic effects and two-way interactions, on the physicochemical properties of the residual agar, was analyzed. The yield (%), gel strength (g/cm2), gelling temperature (°C), melting temperature (°C), 3,6-anhydrogalactose content (%), and the sulfate content (%) were all considered in the evaluation. A multiple regression statistical model was used to fit all the experimental responses to a second-order polynomial equation that confirmed the suitability of the approach. Temperature of 120 °C, low pressure of 3.28 bar, and an extended extraction time of 150 min along with a 3% (w: v) algae concentration were projected to be optimum conditions for a high extraction yield of 17.03%. The strength of the recovered agar hydrogel oscillated between a minimum of 25 g/cm2 and a maximum of 350 g/cm2. The key parameters impacting the fluctuation of the sulfate content in the recovered agar (2% ≤ sulfate content ≤10%, with R2 = 79.8%) appeared to be the temperature and the algae concentration, in addition to the quadratic effect of the solid concentration. By adjusting the parameters, the process can accommodate the physicochemical properties of agar for wider range of applications.en
dc.description.sponsorshipEuropean Commission, Horizon 2020 program through the Marie-Curie Individual Fellowship (H2020-MSCA-IF-2019), with regards to the ALGWAS-BIOR project (Grant agreement number 898804). This work was also supported by the Junta de Castilla y León (JCyL) and the European Regional Development Fund (ERDF) [grant numbers BU301P18 and BU050P20]; as well as the Agencia Estatal de Investigación [grant number AEI /10.13039/501100011033].en
dc.format.mimetypeapplication/pdf
dc.language.isoengen
dc.publisherElsevieres
dc.relation.ispartofFood Hydrocolloids. 2022, V. 129, 107664en
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectResidual crude agar valorizationen
dc.subjectPressurized hot water extractionen
dc.subjectNever-dried algae industry waste streamen
dc.subjectPhysicochemical propertiesen
dc.subjectResponse surface methodologyen
dc.subjectBox-Behnken designen
dc.subject.otherIngeniería químicaes
dc.subject.otherChemical engineeringen
dc.subject.otherAlimentoses
dc.subject.otherFooden
dc.titlePressurized hot water-assisted recovery of crude residual agar from a never-dried algae industry waste stream: A Box-Behnken design approachen
dc.typeinfo:eu-repo/semantics/articlees
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses
dc.relation.publisherversionhttps://doi.org/10.1016/j.foodhyd.2022.107664es
dc.identifier.doi10.1016/j.foodhyd.2022.107664
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/H2020/898804/EU/Sustainable Valorization Of The Algae Industry Waste-Stream Within An Advanced Clean Technologies-Based Integrated Biorefinery Concept
dc.relation.projectIDinfo:eu-repo/grantAgreement/Junta de Castilla y León//BU305P18
dc.relation.projectIDinfo:eu-repo/grantAgreement/Junta de Castilla y León//BU050P20
dc.journal.titleFood Hydrocolloidsen
dc.volume.number129es
dc.page.initial107664es
dc.type.hasVersioninfo:eu-repo/semantics/publishedVersiones


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