Degussa - Huls Ag

European Economic Community

Degussa Aktiengsellschaft

Wolfgang Degener

Walter Pfefferle

Heinz Friedrich

Hermann Lotter

Karl Schugerl

Ioannis Kirgios

A process is disclosed for the fermentative preparation of amino acids, in which an L-lysine producing bacterial strain of the species Corynebacterium glutamicum is cultivated in a nutrient medium and the amino acids can be isolated from the culture medium at the end of fermentation. After the vigorous growth phase, the bacterial culture has at its disposal a smaller quantity of assimilable carbon source than it could metabolize on the basis of the structure of the strain and the quanitity of other necessary supplements provided in the nutrient medium.

Fermentative preparation of amino acids

A process is disclosed for the fermentative preparation of amino acids, in which a strain of the genus Brevibacterium or Corynebacterium producing one or more amino acids is cultivated in a nutrient medium and the amino acids are isolated from the culture fluid at the end of fermentation. After the vigorous growth phase, the bacterial culture has at its disposal a smaller quantity of assimilable carbon source than it could metabolize on the basis of the structure of the strain and the quantity of other necessary supplements provided in the nutrient medium.

Fermentative preparation of lysine with a strain of C. glutamicum

Process for separating and concentrating gallium from an aqueous

Growing community of inventors

Bielefeld, Germany

Wolfgang Degener