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Structural characterisation of deposit layer during milk protein microfiltration by means of in-situ mri and compositional analysis

Schopf, R.; Schork, N.; Amling, E.; Nirschl, H.; Guthausen, G.; Kulozik, U.

Milk protein fractionation by microfiltration membranes is an established but still growing field in dairy technology. Even under cross-flow conditions, this filtration process is impaired by the formation of a deposit by the retained protein fraction, mainly casein micelles. Due to deposition formation and consequently increased overall filtration resistance, the mass flow of the smaller whey protein fraction declines within the first few minutes of filtration. Currently, there are only a handful of analytical techniques available for the direct observation of deposit formation with opaque feed media and membranes. Here, we report on the ongoing development of a non-invasive and non-destructive method based on magnetic resonance imaging (MRI), and its application to characterise deposit layer formation during milk protein fractionation in ceramic hollow fibre membranes as a function of filtration pressure and temperature, temporally and spatially resolved. In addition, the chemical composition of the deposit was analysed by reversed phase high pressure liquid chromatography (RP-HPLC). We correlate the structural information gained by in-situ MRI with the protein amount and composition of the deposit layer obtained by RP-HPLC. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000118968
Veröffentlicht am 18.05.2020
DOI: 10.3390/membranes10040059
Zitationen: 2
Web of Science
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Mechanische Verfahrenstechnik und Mechanik (MVM)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 2077-0375
KITopen-ID: 1000118968
Erschienen in Membranes
Verlag MDPI
Band 10
Heft 4
Seiten Article: 59
Schlagwörter fouling; fractionation; casein; whey protein; filtration resistance
Nachgewiesen in Web of Science
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