Proceedings of the Korean Environmental Health Society Conference (한국환경보건학회:학술대회논문집)

Korean Society of Environmental Health (한국환경보건학회)
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Kinetics for Citric Acid Production from the Concentrated Milk Factory Waste Water by Aspergillus niger ATCC 9142

  • Suh, Myung-Gyo (Department of Medical Administration, Dongeui Institute of Technology) ;
  • Roh, Jong-Su (Department of Medical Administration, Dongeui Institute of Technology) ;
  • Lee, Kook-Eui (Department of Medical Administration, Dongeui Institute of Technology) ;
  • Lee, Yong-Hee (Research Institute of Basic Science & Life Science and Biotechnology Major, Dongeui University) ;
  • Chung, Kyung-Tae (Research Institute of Basic Science & Life Science and Biotechnology Major, Dongeui University)
  • Published : 2005.06.03
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Abstract

The possible use of milk factory waste water as fermentation media for the production of citric acid by cells of Aspergillus niger ATCC 9142 has been investigated. The addition of $Mn^{2+}$, $Fe^{2+}$ and $Cu^{2+}$ to a medium promoted the citric acid production steadily, but addition of another metal ion $Mg^{2+}$decreased the citric acid production. The concentrations of citric acid were marked up to 7.2g/1 and 16.5g/l in a batch bioreactor by A. niger ATCC 9142 with 50g/1 and 100g/l of reducing sugar concentration in milk factory waste water, respectively.

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