Manufacture of low lactose concentrated ultrafiltered-diafiltered retentate from buffalo milk and skim milk.

Lactose concentration was reduced by 68.64 and 74.64 % in buffalo milk and skim milk by their respective 3.05 fold and 4.4 fold UF-DF concentration. The maximum UF-DF concentration of buffalo milk to 66.65 % volume reduction was observed as compared to 74.35 % volume reduction in buffalo skim milk. Average initial permeate flux rate of buffalo milk (42.86 l/h/m(2)) was much lower than skim milk (71.43 l/h/m(2)), which dropped to 2.86 and 5.95 l/h/m(2) during UF-DF concentration. The initial permeate flux rate of homogenized buffalo milk (26.79 l/h/m(2)) was comparatively lower than that of buffalo milk which dropped to 2.38 l/h/m(2) after 66.33 % volume reduction and 3.02 fold UF-DF concentration.