Related Experiment Video
Updated: Jul 30, 2026

Customization of Aspergillus niger Morphology Through Addition of Talc Micro Particles
Published on: March 15, 2012
Citric acid production by Aspergillus niger using media containing low concentrations of glucose or corn starch
T K Nguyen1, L Martínková, L Seichert
1Department of Biotechnology, Czechoslovak Academy of Sciences, Prague.
Abstract:
By using an appropriate ratio of carbon source to mineral components, we obtained comparable citrate yields in media containing different concentrations of glucose. The enzyme system of inoculum passed on gradually from "growth" state to "production" state during the mould growth. In the starch medium, the critical factors of citric acid production are the aeration efficiency of the medium and the amylase formation of the strain. The air interruption exhibited a prolonged inhibition of the production rate but not of the citrate yield in glucose medium while those parameters in starch medium containing excessive urea were briefly but severely inhibited. After being affected by these unfavorable conditions, the production activity of Aspergillus niger could be restored by applying an appropriate fermentation process.
More Related Videos
Related Concept Videos
Microbes in Food Production
Bioreactor Controls-III
Production of Alcohol
Production of Organic Acids
Production of Antibiotics

