Nanofiltration process monitoring and antioxidant activity analysis of skimmed milk samples

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creativework.keywordsantioxidants, flux, fractionation, milk, nanofiltration
creativework.publisherUniversity of Food Technologies Plovdiven
dc.contributor.authorTrayanov I.
dc.date.accessioned2024-07-10T14:27:05Z
dc.date.accessioned2024-07-10T14:50:31Z
dc.date.available2024-07-10T14:27:05Z
dc.date.available2024-07-10T14:50:31Z
dc.date.issued2022-01-01
dc.description.abstractDead-end stirred cell experiments were performed with reconstituted skimmed milk and model solutions of single components (lactic acid). When a low solids concentration is presented with the feed, dead-end filtration with a selected polymeric membrane with cut-off 300 Da is a viable option to assure a high rejection of the dissolved organic compounds (> 90%), combined with a good transport at moderate pressures (20 bar, selected from prior nano-milkfiltrations) with an average flux (JP) increasing from 48 L.m−2.h−1 at 20°C and over 67 L.m−2.h−1 at 50°C until reaching a volume reduction of 5 . The DPPH antioxidant activity was effectively improved (~3 fold) with some insignificant loss due to fouling. Despite the high rejection, transmission of low-molecular weight components is detectable in the permeates, additionally the latter have astoundingly an antioxidant capacity, so each permeate can be divided into time interval fractions-aliquots each showing different DPPH antioxidant activity. This is further confirmed with statistical analysis where р < 0.05. As conclusion, because temperatures up to 50°C significantly increase the flux without much effect on the antioxidant activity, such conditions (temperature, pressure, dilution) are viable options for large-scale production applications.
dc.identifier.doi10.30721/fsab2022.v5.i2.193
dc.identifier.issn2603-3380
dc.identifier.scopusSCOPUS_ID:85141300826en
dc.identifier.urihttps://rlib.uctm.edu/handle/123456789/752
dc.language.isoen
dc.source.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85141300826&origin=inward
dc.titleNanofiltration process monitoring and antioxidant activity analysis of skimmed milk samples
dc.typeArticle
oaire.citation.issue2
oaire.citation.volume5
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