US 2007/0190628 A1Published application

Yeast food composition for fuel ethanol production

OwnerWilliam Ingledew, Eleonora Bellissimiinventors

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Abstract

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 with 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 an optimal combination of elements is selected. The defined yeast food composition is the combination of elements selected with the method and preferably comprises a mixture of ionic salts plus urea. A method for ethanol production in a complex fermentation feedstock supplemented with the defined urea plus salts-based yeast food.

Claims32

Dependent claims

A method for producing a defined yeast food composition for supplementing a complex fermentation feedstock, said feedstock being useful for fermentation production of ethanol therein, the method comprising:

selecting a complex fermentation feedstock;
conducting a first series of steps wherein aliquots of said feedstock are supplemented with selected concentrations of selected individual nutritive elements, said supplemented aliquots being inoculated with a yeast culture and fermentations being conducted therewith,
assessing said fermentations for effects therein of said concentrations of selected individual nutritive elements, and selecting an optimal concentration of each individual nutritive element therefrom;
and
conducting a second series of steps wherein aliquots of said feedstock are supplemented with selected combinations of said individual nutritive elements, said supplemented aliquots being inoculated with a yeast culture and fermentations being conducted therewith,
assessing said fermentations for effects therein of said combinations,
selecting an optimal combination of individual nutritive elements therefrom;
and
preparing a yeast food composition containing said optimal concentrations.

6 more elements

Dependencies are inferred from the claim text.