Uhde Gmbh

Friedrich Uhde Gmbh

Uwe Faust

Wolfgang Sittig

Wilhelm Wengeler

Heinrich Ebner

Wolfgang Lautenschlager

Paul Prave

Beate Dorsemagen

Rudolf Knecht

Norbert Hofer

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.

Process for the continuous fermentation of aqueous slurries for the

The present invention relates to a process and an apparatus for dispersing a gas in a liquid flowing within a vertical cycle through two reaction zones arranged in parallel within a reactor, the liquid/gas mixture flowing upwards in the first reaction zone due to the air-lift pump effect and being degassified at the transition from the first reaction zone to the second reaction zone and the completely or partly degassified liquid flowing down and the liquid being remixed with gas (preferably air) at the transition from the second to the first reaction zone below the two reaction zones.

Process and apparatus for dispersing gas in a liquid

An apparatus for the fermentative conversion of a nutrient mixture by means of microorganisms in the presence of a gas containing oxygen. The nutrient mixture and gas are mixed to yield a phase state with a relative density of less than 0.3 referred to water. The process is carried out in a closed reaction vessel having inlet and outlet pipes for the nutrient mixture, its components and the product. The vessel is also provided with inlet and outlet pipes for the oxygen-bearing gas. A paddle wheel within the vessel provides the distribution device.

Apparatus for the fermentative conversion of a nutrient mixture by means

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Fischbach, Germany

Uwe Faust