ALCOHOLIC FERMENTATION WITH ROSE NIAGARA GRAPE MUST AND YEASTS OF THE SAME FRUIT

Abstract

In order to get technology information, it has been developed common white wine, with musts of Niagara rose (Vitis labrusca) grew in Misiones and native yeasts of its berries. Isothermal alcoholic fermentation was used at 24 ± 1 °C in the flask scale procedure, in enological conditions, with native yeasts and yeast Saccharomyces cerevisiae bayanus as reference. The analytical techniques applied were those of the National Institute of
Viticulture (INV) of Argentina. For the analysis of statistical data, packet 1993 Statgraphic Plus® for Windows Version 5.1 Statistical Graphics Corporation was used. The physicochemical characteristics of the grapes and musts were obtained for agricultural use as raw material. In the fermentation, work of native yeasts was evaluated with respect to S. bayanus with: the residual sugar, alcohol produced, the process time, activity, power, and the fermentation performance. It was found that dry white wines are fit for consumption, complied with the requirements of INV from the standpoint of: ethanol, dry matter content, pH, density, sulfur dioxide (free and total) and acidity (volatile and total).