YEAST FOOD COMPOSITION FOR FUEL ETHANOL PRODUCTION

摘要

A method for producing a defined yeast food composition for supplementing a complex fermentation feedstock used for ethanol production. The method comprises selecting a complex fermentation feedstock and conducting a first series of steps wherein aliquots of the feedstock are supplemented wit h selected concentrations of selected individual nutritive elements. The supplemented aliquots are fermented and assessed for responses to the different nutritive elements whereby a preferred concentration for each element is chosen. A second series of steps is conducted to assess the effects of feedstock supplementation with selected combinations of selected individual nutritive elements on fermentation efficiency and production, wherefrom a preferred combination of elements is selected. The defined yeast food composition is t he combination of elements selected with the method and preferably comprises a mixture of ionic salts plus urea. A method for ethanol production in a compl ex fermentation feedstock supplemented with the defined urea plus salts-based yeast food.