Effect of vegetative inoculum on submerged citric acid fermentation by Aspergillus niger
2003
Ali, S. | Asad-ur-Rehman | Ehsan, A. | Ikram-ul-Haq (Government Coll. Univ., Lahore (Pakistan). Dept. of Botany) | Iqbal, J.
The present investigation deals with the effect of vegetative inoculum on submerged citric acid fermentation by Aspergillus niger using stirred bioreactors. All fermentation were carried out following growth on 15% raw molasses sugars for 144 h. Ferrocyanide (200 ppm) was used to control the trace metals present in the molasses medium. The maximum production of citric acid was obtained when 1.0 % vegetative inoculum was used. The dry cell mass and sugar consumption were 18.5 and 96.55 g I-1, respectively. The mycelia were intermediate round pellets in their morphology. The specific productivity (qp = 0.074 plus minus 0.02a g g-1 cells h-1) was several folds higher than many other workers.
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