Method of producing active dry yeast

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 1/16 (2006.01) C12C 11/02 (2006.01) C12G 1/02 (2006.01) C12G 1/022 (2006.01) C12G 3/02 (2006.01) C12N 1/18 (2006.01)

Patent

CA 2405125

A novel technique is provided for drying a yeast for brewing and a method of producing alcoholic beverages by using the yeast. It is intended to provide a method of producing a dry yeast which has the optimum fermentability when directly used in fermentation and gives an appropriate flavor without needing prepropagation, and a method of producing alcoholic beverages by using the yeast. A method comprising incorporating a stabilizer such as trehalose into a yeast which has been recovered from the fermentation step, and, if desired, further incorporating glycerol into the yeast to thereby lower the water activity in the cells, and then dehydrating/drying the yeast while sustaining a high viable cell ratio and favorable fermentability; and alcoholic beverages produced by using the yeast.

L'invention concerne une nouvelle technique de séchage d'une levure de bière et un procédé de fabrication de liqueurs au moyen du même produit. L'objectif de l'invention est de créer un procédé de fabrication d'une levure sèche qui possède une propriété de fermentation adéquate lorsqu'elle est directement utilisée dans la fermentation sans recourir à la prépropagation, et qui donne un goût savoureux, ainsi qu'un procédé de fabrication de liqueurs au moyen du même produit. Le procédé selon l'invention consiste à permettre qu'une levure ayant été recueillie à partir d'un procédé de brassage puisse absorber un agent stabilisant tel que le tréhalose, et puisse par la suite absorber, le cas échéant, du glycérol afin de diminuer l'humidification des cellules de levure, et ensuite à déshydrater et à sécher la levure tout en conservant un taux de survie et une propriété de fermentation élevés. L'invention se rapporte également à des liqueurs fabriquées au moyen de ladite levure.

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