DEL MONACO silvana Maria
congresos y reuniones científicas
APPLE BAGASSE CHARACTERIZATION AS A SUBSTRATE FOR WINE YEAST BIOMASS PRODUCTION
BRAVO, S.; MORALES, M; DEL MÓNACO S. M.; CABALLERO, A. C.
Simposio; 34 INTERNATIONAL SPECIALIZED SYMPOSIUM ON YEASTS; 2018
Introduction. In the Comahue Region, pear and apple production constitute one of the main economical activities. 40% of harvested apples are destined to concentrated or squeezed juice production. In this study, apple bagasse obtained as a juice industrial waste was characterized for its potential use as an alternative substrate to sugar cane molasse or sugar beet molasse for native wine yeasts biomass propagation. Materials and method. Apple bagasse was characterized by batches, in reducing sugar content (RS), assimilable nitrogen (AN), humidity, pH and total polyphenols according to AOAC techniques. At the same time, different culture media were studied using the Experimental Statistical Design methodology. Growth parameters of two Patagonian wine yeasts Saccharomyces cerevisiae F8 and Pichia kudriavzevii P15 were analysed with Placket-Burman designs comparing apple bagasse and cane molasses (control) as carbon source.Results. Results obtained in the physicochemical analysis indicate that apple bagasse presents a high quality as a potential substrate for biomass propagation, with values similar to those reported for the same apple variety in the region. When apple bagasse was used as carbon source in a culture medium, results showed that this substrate constitutes an improved alternative for yeast biomass production than cane molasses, since it does not require nutritional supplementation to obtain maximum microorganism growth.Conclusions. Apple bagasse generated during regional juice production is presented as a quality alternative for yeast biomass production, with the advantage that it also solves the problem of bagasse disposal without generating environmental liabilities, improving the profitability of the producing companies and contributing to regional productive diversification.