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Role of some whey components on mass transfer in ultrafiltration
Author(s) -
Taddei C.,
Daufin G.,
Aimar P.,
Sanchez V.
Publication year - 1989
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.260340205
Subject(s) - ultrafiltration (renal) , chemistry , fouling , centrifugation , membrane , concentration polarization , chromatography , mass transfer , adsorption , membrane fouling , whey protein , flux (metallurgy) , chemical engineering , biochemistry , organic chemistry , engineering
Ultrafiltration through Carbosep M 4 mineral membrane of protein solutions of decreasing complexity (whey before and after centrifugation or clarification, β‐lactoglobulin) was studied. Mathematical models were used to explain variations in flux with time. Taking into account variations in protein retention and hydraulic resistance of the membrane during ultrafiltration, proteins and lipoproteins were found to be involved not only in the polarization layer (reversible fouling leading to a difference in the osmotic pressure), but also in irreversible fouling by adsorption. Morever, the presence of particles (e.g., inorganic precipitates) in whey explains the build‐up of a deposit over and within the membrane which contributes to the decline in flux after 1 h ultrafiltration. The relative importance of these phenomena was quantified.