Use of stillage residue as a nutrient source for...

Details Use of stillage residue as a nutrient source for... Use of stillage residue as a nutrient source for...

C - Chemistry, Metallurgy

12

P

C12P 7/10 (2006.01) C08H 8/00 (2010.01) C08B 1/00 (2006.01) C12P 7/06 (2006.01) C12P 19/14 (2006.01)

Patent

CA 2745508

A process for the production of ethanol wherein a hydrolyzed lignocellulosic biomass is fermented in the presence of a stillage residue. The fermentation of cellulosic hydrolysates is improved by adding prior to and/or during fermentation a stillage residue side stream from a corn starch-to-ethanol process as a nutrient source for the yeast organisms used in the fermentation. Stillage residues from the grain dry mill ethanol producing process, including the whole stillage, wet cake, thin stillage, and/ or syrup are added to assist as a nitrogen and nutrient source for the fermentive processes. The stillage residue is produced by any grain-to- ethanol process.

L'invention concerne un procédé pour la production d'éthanol, une biomasse lignocellulosique hydrolysée étant fermentée en présence d'un résidu de vinasse. La fermentation des hydrolysats cellulosiques est améliorée en ajoutant avant et/ou pendant la fermentation d'un affluent de résidu de vinasse provenant d'un procédé de transformation d'amidon de maïs en éthanol comme source nutritive pour les organismes de levure utilisés dans la fermentation. Les résidus de vinasse provenant d'un procédé de production d'éthanol de mouture sèche de grains, comprenant la vinasse entière, le pain humide, la vinasse fine, et/ou le sirop, sont ajoutés pour aider en tant que source d'azote nutritive pour les procédés de fermentation. Le résidu de vinasse est produit par un procédé quelconque de transformation de grain en éthanol.

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