Method for preparing a fermented beverage with a low alcohol...

C - Chemistry – Metallurgy – 12 – G

Patent

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Details

C12G 3/08 (2006.01) C12G 1/022 (2006.01) C12G 3/00 (2006.01)

Patent

CA 2612266

The invention concerns a method for preparing a fermented beverage with low alcohol content, in particular a wine with low alcohol content, involving only biological methods for fermenting natural fruit juice. Said method includes essentially the following steps: a) feeding an aerobic culture reactor containing yeasts in multiplication phase with a first fraction of fruit juice; b) feeding an anaerobic fermentation reactor with a medium loaded with yeast obtained at step a) and with a second fraction of fruit juice, to obtain a must; c) filtering the must to separate the yeast and the resulting fermented beverage. In accordance with one important feature, the relative volumes of the first and second fractions of fruit juice are proportional to the desired final degree of alcohol and final proportion of sugar of the fermented beverage. The invention also concerns a device for preparing such a beverage.

La présente invention a pour objet un procédé de préparation d'une boisson fermentée a faible degré d'alcool, notamment un vin peu alcoolisé, faisant appel uniquement à des méthodes biologiques de fermentation de jus de fruit naturels. Ce procédé comprend essentiellement les étapes consistant à : a) alimenter un réacteur de culture aérobie contenant des levures en phase de multiplication avec une première fraction de jus de fruit; b) alimenter un réacteur de fermentation anaérobie avec le milieu chargé en levures obtenu à l'étape a) et une seconde fraction de jus de fruit, pour obtenir un moût; c) filtrer le moût pour séparer la levure et la boisson fermentée ainsi obtenue. Selon une caractéristique importante, les volumes relatifs des premières et secondes fractions de jus de fruit sont proportionnels au degré alcoolique final et au taux de sucre final voulus de la boisson fermentée. L'invention a également pour objet un dispositif destiné à la préparation d'un tel breuvage.

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