2026-11-02T15:38:51Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/98162024-12-20T01:05:26Zcom_10259_4244com_10259_5086com_10259_2604col_10259_4245

Benito Román, Oscar Ruiz Pérez, María Olga Sanz Díez, Mª Teresa Beltrán Calvo, Sagrario 2024-12-19T11:40:47Z 2024-12-19T11:40:47Z 2024-12 2213-3437 http://hdl.handle.net/10259/9816 10.1016/j.jece.2024.114845 This work aims the valorisation of onion peels by recovering high added value compounds (flavonoids and pectin derived compounds (PDC)) in a three stages water-based cascade process, using subcritical water (SubW) hydrolysis and diafiltration using ceramic tubular membranes. After quercetin and derivatives were recovered in a hydroalcoholic extraction process, the onion peels were subjected to a SubW process that yielded three different hydrolysates (severity factors in the range 2.88–3.29). These hydrolysates resulted to be complex multicomponent mixtures with variable shares of partially hydrolysed PDC, degradation products (HMF, furfural, organic acids) and free monosaccharides. The 50 kDa membrane effectively removed more than 98 % of the impurities present in the hydrolysates after a dilution volume of 3.5. In order to mitigate the observed membrane fouling, a pre-treatment step via centrifugation was used to remove colloidal matter besides colour which allowed the use of the 5 kDa membrane to obtain a retentate that contained over 80 % of the initial PDC with a final purity of 82 % after a dilution volume of only 2.0. This work was supported by the Agencia Estatal de Investigación (AEI) though projects PID2020–116716RJ-I00/ AEI / 10.13039/501100011033, PID2019–104950RB-I00 / AEI / 10.13039/501100011033 and TED2021–129311B-I00. application/pdf eng Elsevier Journal of Environmental Chemical Engineering. 2024, V. 12, n. 6, 114845 https://doi.org/10.1016/j.jece.2024.114845 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020–116716RJ-I00/ES/TECNOLOGIAS DE FLUIDOS PRESURIZADOS PARA LA VALORIZACION DE SUBPRODUCTOS DE LA INDUSTRIA AGROALIMENTARIA: RECUPERACION DE PECTINA Y OTROS COMPUESTOS BIOACTIVOS DE ALTO VALOR/ info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-104950RB-I00/ES/VALORIZACION DE SUBPRODUCTOS MARINOS MEDIANTE TECNOLOGIAS DE FLUIDOS SUB- Y SUPERCRITICOS PARA LA OBTENCION DE BIOCOMPUESTOS VALIOSOS/ info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica, Técnica y de Innovación 2021-2023/TED2021-129311B-I00/ES/Tecnologías verdes basadas en el empleo de fluidos presurizados para valorizar biomasa lignocelulósica mediante la producción de furfural/ Attribution-NonCommercial-NoDerivatives 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Subcritical water extraction Diafiltration Membrane Biorefinery Oligosaccharides Ingeniería química Alimentos Chemical engineering Food Biorefinery approach for the development of an integrated extraction and purification process for the recovery of pectin derived compounds and flavonoids from onion peels info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Journal of Environmental Chemical Engineering 12 6 114845