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To obtain blueberry juice with a high content of antioxidants it is necessary to introduce an enzymatic depectinization step into the process. Due to the importance of this step in the final properties of blueberry juice it is critical that the operation conditions be optimized. The aim of this research was to evaluate the effects of temperature, duration of treatment and enzymatic complex concentration on anthocyanin content and juice yield during enzymatic depectinization. Results indicated that the best factor combination was 50ºC during 1.3h and 4mg 100g-1 of LAFASE(r) CLARIFICATION and 8mg 100g-1 of LAFASE(r) HE GRAND CRU enzymatic complex concentration. Under these conditions, blueberry juice with 798.41±8.03mg of cyanidin-3-glucoside L-1 and a juice yield of 87% was obtained. The combination of the response surface and desirability function methodologies enabled the optimization of the blueberry juice during the depectinization step, in terms of anthocyanin content and juice yield

Multiple response optimization of blueberry juice depectinization