Fermentation time (h) Medium Whey Whey-pineapple juice blend (65w:35P) pH T.A% pH T.A.% 5 4.82 0.394 4.36 0.546 10 4.42 0.511 4.32 0.605 15 4.00 1.077 4.20 0.806 20 3.61 1.265 3.78 0.896 24 3.30 1.353 3.87 0.926   Medium (A) Fermentation time (B) A x B S.E.M. 0.0207 0.00043 0.0328 0.0668 CD at 5% 0.0612 0.0127 0.0968 0.0201 * Incubation temperature: 37 ± 1°C

Table 4: Effect of fermentation period on the pH and titratable acidity of whey with and without pineapple juice*.