Wacker Chemie Ag

Anneliese Reutter-Maier

Tobias Dassler

Thomas Schloesser

Markus Brunner

Günter Wich

Thomas SCHLÖSSER

The invention relates to a method for producing L-cystine by fermenting a microorganism strain in a fermentation medium, in which method L-cystine is precipitated in an amount of at least 70% relative to the total cysteine, characterized in that the Osaturation of the fermentation medium is kept at least at 1% and at most at 40&#xb1;3% during the formation of L-cystine.

Method for producing L-cystine by fermentation under controlled oxygen saturation

A method for the production of natural L-cysteine by fermentation in a production fermenter in which a microorganism strain is cultured in a fermentation medium, characterized in that the fraction of the compounds L-cysteine, L-cystine and thiazolidine in the fermentation medium is controlled in a targeted manner by an iron concentration of a maximum of 8 mg/l in the fermentation medium.

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Kirchseeon, Germany

Anneliese Reutter-Maier