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Journal of Biological Sciences
Year: 2002  |  Volume: 2  |  Issue: 11  |  Page No.: 760 - 761

Time Course Profile of Citric Acid Fermentation by Aspergillus niger and its Kinetic Relations

Aamir Ishaq, Sikander Ali, Ikram-ul-Haq and M.A. Qadeer    

Abstract: The present study is concerned with the time course profile of citric acid fermentation by Aspergillus niger and its kinetic reletions. Maximum amount of anhydrous citric acid (70.60 g l-1) obtained, 144 h after inoculation, with a sugar consumption of 88.40 g l-1. The dry weight of mycelia was 17.39 g l-1. On the basis of comparison of kinetic parameters namely the product and growth yield coefficients (Yp/s, Yp/x), volumetric rates (Qq) and specific rate constants (qp), it was observed that mutant strain of Aspergillus niger GCB47 was a faster growing organism and has the ability to hyper produce citric acid.

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