Industrial scale spiral wound polymeric polyvinylidene fluoride (PVDF) microfiltration (MF) membrane module with a cut-off value of 800 kDa was used to produce skimmed milk retentate with volume concentration factors (CF) of 4, 10 and 70. Concentration factors 10 and 70 were reached by diafiltration (DF) of the MF retentate with ultrafiltered (UF) MF permeate. Distribution of whey solids to MF permeate and retentate was studied, focussing on whey proteins alpha-lactalabumin (alpha-LA) and beta-lactoglobulin (beta-LG). Concentrations of these proteins were increased in MF permeate as CF was increased to CF 4, but decreased rapidly as DF was introduced. After CF 10 further diafiltration resulted in limited difference in the retentate or permeate whey protein (WP) composition After CF 70 the mass flux of the proteins was negligible and the filtration was terminated. The mass of WP, alpha-LA and beta-LG in CF 70 retentate was reduced by 77.0, 95.8 and 93.5%, respectively. The retention of casein exceeded 98%.
|Julkaisu||MILCHWISSENSCHAFT-MILK SCIENCE INTERNATIONAL|
|Tila||Julkaistu - 2010|
|OKM-julkaisutyyppi||A1 Julkaistu artikkeli, soviteltu|