The effect of mass transfer on bio-oxidation of ferrous iron using Thiobacillus ferrooxidans

T. Das, M.K. Ghosh*, G. Roy Chaudhury

Regional Research Laboratory, Bhubaneswar - 751 013, India

Received 28 June 2002; accepted 15 January 2003


Bio-oxidation studies were carried out using Thiobacillus ferrooxidans in a bioreactror. The effect of gas-liquid mass transfer of oxygen and liquid-bacterial surface transfer of ferrous were established. The maximum oxygen and ferrous transfer rates were evaluated for each set of experiment and the same were compared with the maximum oxygen and ferrous consumption rate by the microorganisms. It was observed that neither oxygen nor ferrous transfer was not rate controlling step. Ferrous iron oxidation by Thiobacillus ferrooxidans in the present study was reaction controlled.

Keywords: Thiobacillus ferrooxidans; mass transfer; bioreactor; bio-oxidation

* Corresponding author
   E-mail : mkghosh@rrlbhu.res.in