2026-04-20T11:35:26Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/58572021-11-02T12:02:24Zcom_10259_4244com_10259_5086com_10259_2604col_10259_4569

Trigueros Andrés, Ester 557 500 Alonso Riaño, Patricia aad9756c-ad87-4f31-ba02-459668ce3469 500 Sanz Díez, Mª Teresa 530 500 Beltrán Calvo, Sagrario 57 500 Ramos Rodríguez, Cipriano 464 500 Benito Román, Oscar 59 500 0000-0002-4418-0045 2021-08-24T09:32:38Z 2021-08-24T09:32:38Z 2021 http://hdl.handle.net/10259/5857 Trabajo presentado en: 18th European Meeting on Supercritical Fluids. 2021, 4-6 de mayo, Burdeos (online) Introduction Gelidium sesquipedale residue after industrial agar extraction is a very valuable by-product because of its carbohydrate, protein and bioactive compounds content. Subcritical water (SW) extraction was carried out by using different solvent flow rates (4, 6 and 8ml/min) to study the effect of residence time (RT = 6.0, 4.2 and 3.0 minutes, respectively) on sugars hydrolysis and fractionation at 185°C. Results and discussion Macroalga residue after industrial agar extraction presents an important fraction of carbohydrate composed by glucans (23.4%), galactans (10.9%) and arabinans (2.9%). Accumulated hydrolysis curves for arabinans, galactans and glucans by using SW are shown in Figure 1. No monomers were observed under work conditions in subcritical water extracts so that carbohydrate fraction was recovered as sugar oligomers. Sugars extraction curves show how the lower the residence time, the higher extraction yields for all components. Moreover, a preferential hydrolysis was observed for galactans, followed by arabinans and glucans that showed the lowest yield. As has been seen, increasing and faster extraction has been found at increasing flow rate due to promotion of mass transfer of the solutes from by-product matrix1, that is translated into a greater compounds extraction. Similar results were found in literature about residence time effect on bioactive compounds extraction2,3. Conclusions SWE constitutes an interesting technique for sugars recovery, promoting a better use of the alga residue generated in the food industry without using organic solvents in compare to conventional treatments. Low residence times led to higher sugars recovery by SW treatment. JCyL and ERDF for financial support of projects BU301P18, BU050P20 and O. Benito-Román’s post-doctoral contract. To Agencia Estatal de Investigación for project funding PID2019-104950RB-I00/AEI/10.13039/501100011033. To the company Hiperbaric through project BIOLIGNO (10/16/BU/0017), funded by ERDF and JCyL through ICE. application/pdf eng Ingeniería química Chemical engineering Hydrothermal fractionation of Gelidium sesquipedale alga residue by subcritical water extraction info:eu-repo/semantics/conferenceObject info:eu-repo/semantics/acceptedVersion info:eu-repo/semantics/openAccess info:eu-repo/grantAgreement/JCyL/BU301P18 info:eu-repo/grantAgreement/JCyL/BU050P20 info:eu-repo/grantAgreement/AEI/PID2019-104950RB-I00/AEI/10.13039/501100011033 ORIGINAL Hydrothermal_fractionation_of_Gelidium_sesquipedale_alga.pdf Hydrothermal_fractionation_of_Gelidium_sesquipedale_alga.pdf application/pdf 2823189 https://riubu.ubu.es/bitstream/10259/5857/1/Hydrothermal_fractionation_of_Gelidium_sesquipedale_alga.pdf 85d344e04dd4868ae5297f52200fa3ca MD5 1 LICENSE license.txt license.txt text/plain; charset=utf-8 999 https://riubu.ubu.es/bitstream/10259/5857/2/license.txt b295bcbce42e2caabeb0c623d3860c06 MD5 2 THUMBNAIL Hydrothermal_fractionation_of_Gelidium_sesquipedale_alga.pdf.jpg Hydrothermal_fractionation_of_Gelidium_sesquipedale_alga.pdf.jpg IM Thumbnail image/jpeg 5179 https://riubu.ubu.es/bitstream/10259/5857/3/Hydrothermal_fractionation_of_Gelidium_sesquipedale_alga.pdf.jpg 11cb981ce030376c00547e2cc2e55afd MD5 3 10259/5857 oai:riubu.ubu.es:10259/5857 2021-11-02 13:02:24.296 Repositorio Institucional de la Universidad de Burgos bubrep@ubu.es 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