title: Increasing fermentation efficiency at high sugar concentrations by supplementing an additional source of nitrogen during the exponential phase of the tequila fermentation process.
abstract: In the tequila industry, fermentation is traditionally achieved at sugar concentrations ranging from 50 to 100 g x L(-1). In this work, the behaviour of the Saccharomyces cerevisiae yeast (isolated from the juices of the Agave tequilana Weber blue variety) during the agave juice fermentation is compared at different sugar concentrations to determine if it is feasible for the industry to run fermentation at higher sugar concentrations. Fermentation efficiency is shown to be higher (above 90%) at a high concentration of initial sugar (170 g x L(-1)) when an additional source of nitrogen (a mixture of amino acids and ammonium sulphate, different than a grape must nitrogen composition) is added during the exponential growth phase.
authors.affiliation: Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco A.C., Avenida Normalistas 800, Sector Hidalgo, Apto. postal 2-191, 44270 Guadalajara, México,
authors.forename: Javier
authors.initials: J
authors.lastname: Arrizon
authors.forename: Anne
authors.initials: A
authors.lastname: Gschaedler
mesh_terms: D000434:Alcoholic Beverages; D050260:Carbohydrate Metabolism; D000431:Ethanol / Q000032:analysis; D005285:Fermentation; D019649:Food Industry; D009584:Nitrogen / Q000032:analysis / Q000378:metabolism*; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification / Q000378:metabolism; D012441:Saccharomyces cerevisiae / Q000737:chemistry / Q000378:metabolism
chemical_list: D010936:Plant Extracts; D000431:Ethanol; D009584:Nitrogen