Method for Improving Acid tolerance of Propionibacterium acdipropionici

Abstract

The invention provides a simple and effective method for improving acid tolerance of P. acdipropionici by adding arginine and/or aspartic acid to the culture medium. The acid tolerance of P. acdipropionici was improved by 60% and 20% respectively through adding arginine or aspartic acid into the culture medium. Consequently, PA production was improved by 36% and 26%, respectively. The maximal PA production was obtained by adding both 20 mM arginine and 20 mM aspartic acid. This method can be applied to large scale production of PA.

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