2026-07-09T19:41:05Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/95852024-10-04T00:05:17Zcom_10259_4244com_10259_5086com_10259_2604col_10259_4245
Repositorio Institucional de la Universidad de Burgos
author
Ruiz Pérez, María Olga
author
Benito Román, Oscar
author
Beltrán Calvo, Sagrario
author
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.
eng
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Pectic oligosaccharide fractionation
Diafiltration purification
Membrane fouling
Onion skin byproduct
Green technologies
Fractionation and refining of pectic oligosaccharides derived from onion skins through continuous feed diafiltration
info:eu-repo/semantics/article
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URL
https://riubu.ubu.es/bitstream/10259/9585/1/Ruiz-jms_2024.pdf
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URL
https://riubu.ubu.es/bitstream/10259/9585/2/Ruiz-jms_2024-Supplementary_data.pdf
File
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Ruiz-jms_2024-Supplementary_data.pdf