Comparison of fouling of raw milk and whey protein solution on stainless steel and fluorocarbon coated surfaces: Effects on fouling performance, deposit structure and composition
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Publication Date
2019Journal Title
Chemical Engineering Science
ISSN
0009-2509
Publisher
Elsevier BV
Volume
195
Pages
423-432
Type
Article
Metadata
Show full item recordCitation
Magens, O., Hofmans, J., Adriaenssens, Y., & Ian Wilson, D. (2019). Comparison of fouling of raw milk and whey protein solution on stainless steel and fluorocarbon coated surfaces: Effects on fouling performance, deposit structure and composition. Chemical Engineering Science, 195 423-432. https://doi.org/10.1016/j.ces.2018.09.039
Abstract
Fouling from raw milk and from whey protein solutions mimicking the protein content of milk have been performed at two length scales, using a microfluidic heat transfer cell and a bench-scale device with hydraulic diameters 1:0mm and 16:1 mm, respectively. The microfluidic cell allows raw milk to be studied in once-through mode and was used to identify
polymer coated surfaces to test against stainless steel. Several of the
fluorocarbon coated surfaces reduced the mass deposition but the pressure drop and thermal resistance did not match these directly, indicating that the nature and structure of the deposit is affected by the surface. A fluorinated ethylene propylene coating was identified as a promising candidate for large scale tests. At the interface with apolar surfaces, raw milk fouling layers were high in protein whereas a strongly attached mineral-rich layer was present at the interface with steel. The attraction of denatured protein towards apolar surfaces and the formation of a calcium phosphate layer on steel at later stages of fouling are explained with arguments based on the interfacial free energy of these materials in water.
Sponsorship
The work was funded by Chemours Belgium BVBA
Identifiers
External DOI: https://doi.org/10.1016/j.ces.2018.09.039
This record's URL: https://www.repository.cam.ac.uk/handle/1810/286274
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