Citric acid production in chemically defined media by Aspergillus niger |
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| Authors: | Katarina Jernejc Aleksa Cimerman Anton Perdih |
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| Affiliation: | (1) Chemical Institute !["ldquo"]("/content/q6m4m0851x63pg07/xlarge8220.gif") Boris Kidri!["ccaron"]("/content/q6m4m0851x63pg07/xlarge269.gif") !["rdquo"]("/content/q6m4m0851x63pg07/xlarge8221.gif") , 61000 Ljubljana, Yugoslavia;(2) Department of Chemistry and Chemical Technology, Edvard Kardelj University of Ljubljana, 61000 Ljubljana, Yugoslavia |
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| Abstract: | Summary The effect of changing the composition of a chemically defined medium on citric acid production by Aspergillus niger was investigated. High and reproducible amounts of citric acid were obtained with deionized commercial sugar solutions, proper phosphate concentrations, low initial pH values and suitable amounts of copper as growth inhibiting agent.Comparison of high and low yielding process parameters showed that under high yielding conditions, (deionized sugar, Cu++ addition) besides more citric acid, less mycelium and less mycelial lipids were formed; the consumption of sugar, nitrogen and phosphorus was related to the amount of biomass.Partly presented at the XII. International Congress of Microbiology; München, September 3–8, 1978 |
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