Graphical Approach for the Optimization of the Production of Clarified Lychee Juice by Pectinase Treatment
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Abstract:
In order to obtain the clarified lychee juice, the effect of pectinase concentration (0.02%~0.06%), temperature (35~55 ℃) and time (1~3 h) on the yield and clarity of lychee juice was determined by using the response surface mythology (RSM). The results showed that the yield and clarity of juice were increased by enzymatic treatment. The optimum conditions for enzymatic treatment of lychee pulp obtained by RSM with graphical approach were 0.045%~0.05% (m/m) of pectinase concentration, 46~50℃ of temperature and 2.0~2.5 h of enzymatic time. The predicted values for juice yield and clarity were 90.40% and 91.10%, respectively, which was in accordance with the experimental values.
