Production of Star Fruit Alcoholic Fermented Beverage.

Star fruit ( Averrhoa carambola ) is a nutritious tropical fruit. The aim of this study was to evaluate the production of a star fruit alcoholic fermented beverage utilizing a lyophilized commercial yeast ( Saccharomyces cerevisiae ). The study was conducted utilizing a 23 central composite design and the best conditions for the production were: initial soluble solids between 23.8 and 25 °Brix (g 100 g-1 ), initial pH between 4.8 and 5.0 and initial concentration of yeast between 1.6 and 2.5 g L-1 . These conditions yielded a fermented drink with an alcohol content of 11.15 °GL (L 100 L-1 ), pH of 4.13-4.22, final yeast concentration of 89 g L-1 and fermented yield from 82 to 94 %. The fermented drink also presented low levels of total and volatile acidities.