Fe2＋ oxidation by Acidithiobacillus ferrooxidans（***） under different solid contents by adding inert Al2O3 powder was examined in rotating-drum and stirred-tank *** results show that the bioactivity of *** in the s...
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Fe2＋ oxidation by Acidithiobacillus ferrooxidans（***） under different solid contents by adding inert Al2O3 powder was examined in rotating-drum and stirred-tank *** results show that the bioactivity of *** in the stirred-tank is higher than that in the rotating-drum in the absence of Al2O3 powder,but the biooxidation rate of Fe2＋ decreases markedly from 0.23 g/（L·h） to 0.025 g/（L·h） with increasing the content of Al2O3 powder from 0 to 50%（mass fraction） in the stirred-tank probably due to the deactivation of *** resulting from the collision and friction of solid *** increase in Al2O3 content has a little adverse effect on the bioactivity of *** in the rotating-drum due to different mixing mechanisms of the two *** biooxidation rate of Fe2＋ in the rotating-drum is higher than that in the stirred-tank at the same content of Al2O3 powder,especially at high solid *** higher bioactivity of *** can be maintained for allowing high solid content in the rotating-drum reactor,but its application potential still needs to be verified further by the sulfide bioleaching for the property differences of Al2O3 powder and sulfide minerals.
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