The effect of heat treatment of caprine milk on the composition of cheese whey

Abstract

In three independent trials, caprine milk from the same batch was divided into three lots, which were heated at 65 degrees C for 30 min, 80 degrees C for 5 min or 90 degrees C for 5 min. Representative whey samples collected during the whole cheese making process were analysed for fat, protein and dry matter contents, which decreased as the heating temperature of milk increased. Percentages of serum albumin and beta-lactoglobulin in the total proteins of whey decreased as the heating temperature of milk increased, while alpha-lactalbumin and glycomacropeptide increased, particularly in the 90 degrees C whey. Lactoferrin and the immunoglobulin-heavy chain were only detected in the 65 degrees C whey.