초록 ▼

A continuous process for the production of alcohol and yeast biomass by reaction in a uniform fermenting mixture of a sugar-bearing, aqueous slurry, starter yeast, yeast nutrients and an oxygen-bearing gas, wherein the yeast is a flocculating, bottom yeast, the portion of the wort which remains afte

A continuous process for the production of alcohol and yeast biomass by reaction in a uniform fermenting mixture of a sugar-bearing, aqueous slurry, starter yeast, yeast nutrients and an oxygen-bearing gas, wherein the yeast is a flocculating, bottom yeast, the portion of the wort which remains after separation of the alcohol-bearing medium therefrom, is recycled to the fermenting mixture, the oxygen-bearing gas is dispersed homogeneously throughout the fermenting mixture, and is introduced to maintain a mean-free oxygen concentration not greater than 1 ppm in the aqueous phase, and the process is controlled to maintain the measurable free sugar concentration in the fermenting mixture at a level which does not exceed 0.1 percent by weight, and to maintain the active yeast concentration in the fermenting mixture between 100 and 110 percent of the specific degree of fermentation.

대표청구항 ▼

In a continuous process for the production of alcohol and yeast biomass by reaction in a uniform fermenting mixture of a sugar-bearing, aqueous slurry, starter yeast, yeast nutrients and an oxygen-bearing gas, the process comprising the steps of continuously withdrawing from the fermenting mixture a

In a continuous process for the production of alcohol and yeast biomass by reaction in a uniform fermenting mixture of a sugar-bearing, aqueous slurry, starter yeast, yeast nutrients and an oxygen-bearing gas, the process comprising the steps of continuously withdrawing from the fermenting mixture a yeast- and alcohol-bearing wort which forms therein and separating from the withdrawn wort an alcohol-bearing medium, while continuously feeding to the mixture fresh aqueous slurry, the starter yeast, the yeast nutrients and the oxygen-bearing gas, the improvement wherein the yeast is a flocculating, bottom yeast, the portion of the wort which remains after separation of the alcohol-bearing medium therefrom, is recycled to the fermenting mixture, the oxygen-bearing gas is dispersed homogeneously throughout the fermenting mixture, and is introduced to maintain a mean-free oxygen concentration not greater than 1 ppm in the aqueous phase, and the process is controlled to maintain the measurable free sugar concentration in the fermenting mixture at a level which does not exceed 0.1 percent by weight, and to maintain the active yeast concentration in the fermenting mixture between 100 and 110 percent of the specific degree of fermentation.