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Title:  Effect of transition metal ions on the metabolism of Aspergillus niger in the production of citric acid with molasses as substrate
Authors: Angumeenal, A R
Venkappayya, D
Keywords:  Aspergillus niger
Metal ions
Citric acid
Issue Date: Feb-2005
Publisher: CSIR
IPC CodeC 12 P 1/02
Abstract:  A two-stage process for the treatment of molasses was employed. Early germination with rapid multiplication of the microbe was observed. The nutritional quality of the medium was enriched by the addition of certain transition metal ions (Cr, Fe, Co, Ni, Cu, Mo, Cd & Pb), of which Ni was found to serve as a good nutritional supplement. Batch fermentations by surface culture were carried out and the possible mechanism for the metabolic changes taking place in Aspergillus niger during the production of citric acid is discussed. Using nickel, as high as 269 mg/ml of citric acid was produced.
Page(s): 125-128
ISSN: 0975-1084 (Online); 0022-4456 (Print)
Source:JSIR Vol.64(02) [February 2005]

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