Abstract
Ultrafiltration (UF) is used for the concentration of whey proteins from whey. Membrane fouling during processing results in a decrease in flux, while the predominant molecular fouling reaction and fouling species are still largely unknown. Heat-induced whey protein aggregates are inevitably generated in industrial cheese-making processes, and were found to accelerate membrane fouling during whey concentration. By means of upstream microfiltration prior to UF, these aggregates can be selectively removed. By this means, UF flux could be increased up to twofold for the UF of sweet whey and threefold for acid whey. For filtration of sweet whey, significant calcium retention was observed. Therefore, membrane fouling for both whey types seem follow different molecular mechanisms. Besides the removal of whey protein aggregates, the retention of microorganisms and a log-reduction of up to log 3.5 was achieved by pre-filtration. Shelf-life of whey could be increased to two weeks without pasteurisation.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
