Abstract
The purpose of this study was to determine the optimum spray drying conditions of soft persimmon latte using response surface methodology that is a statistical procedure used for optimization studies. A central composite design was applied to investigate the effects of independent variables, inlet temperature (X1), air flow rate (X2), and feed flow rate (X3), on responses such as yield, water absorption index, and total phenolic compounds. Statistical analysis revealed that independent variables significantly affected all the responses. A maximum yield of 8.11 g was obtained at 90°C of X1, 51.82 mL/min of X2 and 7.00 mL/min of X3. A minimum water absorption index of 0.58 was obtained at 101°C of X1, 60.00 mL/min of X2 and 17.00 mL/min of X3. A maximum total phenolic compounds of 298.02 μg/mL was obtained at 90°C of X1, 43.33 mL/min of X2 and 17.00 mL/min of X3. In conclusion, the best spray drying conditions were as follows: X1, 90°C; X2, 53 mL/min; X3, 17 mL/min. Under those optimal conditions, the powder’s yield (7.46 g), water absorption index (0.54), and the content of total phenolic compounds (294.75 μg/mL) were estimated.
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