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1 second-step fermentation method R8G China feed industry information network – based on feed, service animal husbandry
Also known as the precursor addition method, developed in the early 1950s The second-step fermentation method is used as a raw material with lysine precursor diaphragust, and the enzyme produced by microorganisms is made to dearboxygenic transformation into lysine. In the 1970s, Japan was used to immobilize the diaminophenic acid decarboxylase or a bacterium containing the enzyme, and the intrinsic 2,6-diaminophenic acid decarboxylation was continuously produced by lyconic acid, and the process was improved. Despite this, the process is still more complicated, and it has been replaced by direct fermentation method. R8G China Feed Industry Information Network – Based on Feed, Serving Animal Husbandry
R8G China Feed Industry Information Network – Based on Feed, Serving Animal Husbandry 123] A widely used lysine production method. Commonly used raw materials are cheap glycogen, such as sugar cane or beets, starch hydrolyzate, etc. In addition, acetic acid, ethanol, etc. are also available for use with raw materials. Direct fermentation method produces three major microorganisms of lysine, and three types of mutant strains such as glutamate, yellowish bacilli, lactose fermented bacterium. In the 1970s, due to the progress of breeding technology, a mutant strain having multiple genetic labels has been branched, making the process increasingly mature, and the yield of lysine is also doubled. The highest production rate in industrial production has been raised to 100 to 120 g per liter of fermentation, and the extraction rate is about 80 to 90%. R8G China Feed Industry Information Network – Based on Feed, Serving Animal Husbandry
