Abstract:The effects of enzymatic hydrolysis on the fruit pulp were investigated in this study. The optimum conditions were investigated based on the viscosity and juice yield of the pitaya juice. On the base of single factor analysis, the suitable temperature, time, enzyme dosage and the best value range of pH value were determined, and then the best choice of single enzyme and compound enzymes were confirmed. Eventually, the optimum technical conditions for liquidizing pitaya juice were confirmed by L9 (34) orthogonal analysis and the optimum technological conditions were verified. The combination of pectinase, cellulase and hemicellulase was used under the conditions of temperature 50℃, time 45 min, enzyme adding quantity 0.07% and pH value 4.3. Under these conditions, the pitaya purees viscosity was sharply decreased by 170.5 mpa·s and juice yield was obviously increased by 14.8%. Besides, the pitaya juice had good color and acceptable taste.
