Abstract
AbstractThe efficiency of 6‐aminopenicillanic acid (6‐APA) production by enzyme‐catalyzed hydrolysis of penicillin G using penicillin G amidase (E. C. 3.5.1.11) immobilized in polyacrylamide gel can be improved by using a lower substrate concentration and an optimized low buffer concentration. In a continuous process the combination of a stirred‐tank reactor and a plug‐flow reactor gives optimum productivity. Since precipitation of 6‐APA is the crucial step in downstream processing, the product concentration has to be as high as possible. This can be achieved by concentrating the product solution by reverse osmosis.
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