2026-07-09T16:53:16Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/95852024-10-04T00:05:17Zcom_10259_4244com_10259_5086com_10259_2604col_10259_4245

Ruiz Pérez, María Olga Benito Román, Oscar Beltrán Calvo, Sagrario Sanz Díez, Mª Teresa 2024-10-03T08:07:37Z 2024-10-03T08:07:37Z 2024-08 0376-7388 http://hdl.handle.net/10259/9585 10.1016/j.memsci.2024.123054 In this work, a diafiltration-based process was investigated for the recovery of pectic oligosaccharides produced by subcritical water hydrolysis from onion skin waste. Four tubular ceramic membranes from 100 to 1 kDa were selected based on the molecular weight of the different galacturonic acid species present in the onion skin hydrolysate. All these membranes showed high selectivity towards pectic oligosaccharides, with low retention for free galacturonic acid, monosaccharides, organic acids, and other impurities. The 50 and 100 kDa membranes completely retained pectic oligosaccharides with a molecular weight exceeding 80 kDa, accounting for approximately 30 % of the initial pectic oligosaccharides in the hydrolysate. However, the purification rate was significantly slower using the 50 kDa membrane due to the increased cake layer resistance. Furthermore, it was examined a fractionation/purification cascade involving sequential diafiltration stages using 100, 10, and 1 kDa membranes at 25 °C, TMP = 1 bar, and a crossflow velocity of 1.5 m s−1. Approximately 87 % of the initial pectic oligosaccharides were successfully recovered and purified in the retentates, highlighting their potential for diverse applications due to their narrow molecular weight distribution, while phenolic compounds and other valuable low molecular weight molecules were recovered in the final permeate. This work was supported by the Agencia Estatal de Investigación [grant numbers PID2020-116716RJ-I00 , PDC2022-133443-I00 , PID2022-136385OB-I00 ] and the Junta de Castilla y León (JCyL) and the European Regional Development Fund (ERDF) [grant number BU027P23 ]. Benito Román post-doctoral contract was funded by the Agencia Estatal de Investigación through project PID2020–116716RJ-I00 . application/pdf eng Elsevier Journal of Membrane Science. 2024, V. 708, 123054 https://doi.org/10.1016/j.memsci.2024.123054 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, Técnica y de Innovación 2021-2023/PDC2022-133443-I00/ES/Diseño de un prototipo para la extracción de bioproductos con agua subcrítica/ info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica, Técnica y de Innovación 2021-2023/PID2022-136385OB-I00/ES/NUEVAS ESTRATEGIAS PARA LA PRODUCCION DE ACIDO LACTICO DE SEGUNDA GENERACION EMPLEANDO TECNOLOGIAS EMERGENTES BASADAS EN FLUIDOS PRESURIZADOS/ info:eu-repo/grantAgreement/Junta de Castilla y León//BU027P23//Tecnologías sostenibles de fluidos presurizados para valorizar subproductos de la industria agroalimentaria ricos en proteínas: nuevas estrategias, escalado y análisis tecno-económico y medioambiental/ Attribution-NonCommercial-NoDerivatives 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Pectic oligosaccharide fractionation Diafiltration purification Membrane fouling Onion skin byproduct Green technologies Ingeniería química Biotecnología Chemical engineering Biotechnology Fractionation and refining of pectic oligosaccharides derived from onion skins through continuous feed diafiltration info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Journal of Membrane Science 708 123054