KINETIC STUDIES ON CITRIC-ACID PRODUCTION BY ASPERGILLUS-NIGER .1. PHASES OF MYCELIUM GROWTH AND PRODUCT FORMATION

  • 1 January 1975
    • journal article
    • research article
    • Vol. 7  (3) , 185-193
Abstract
The physiology and growth kinetics of A. niger B-64-5 in shaken culture were studied; 5 successive phases of citric acid fermentation were distinguished. Growth was diauxic; spore germination was followed by an exponential growth phase, then a period of growth disturbance and finally a phase of secondary growth characterized by a constant coefficient of growth decline. Citric acid production started in the growth disturbance phase. The major increase in citric acid concentration occurred in the production phase, i.e., in the last fermentation phase.

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