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CO2 supply in the biooxidation of an enargite-pyrite gold concentrate

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Abstract

CO2 supply at 4% (v/v) in air increased the biooxidation of a gold concentrate (41% enargite, 43% pyrite) with Thiobacillus ferrooxidans in a 2-l bioreactor at 4% (w/v) solids concentration, 35°C and pH 2.4. Extraction increased from 21 to 69% for Fe, 19 to 25% for As, and 16 to 19% for Cu. Suspended biomass increased from 2.6·107 to 1.2·108 cells/ml. It is concluded that the biooxidation of this gold concentrate is limited by the rate of CO2 supply. © Rapid Science Ltd. 1998

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Authors and Affiliations

  1. School of Biochemical Engineering, Universidad Católica de Valparaíso, Casilla, Valparaíso, Chile

    F. Acevedo, J.C. Gentina & N. García

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  1. F. Acevedo
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  2. J.C. Gentina
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  3. N. García
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Acevedo, F., Gentina, J. & García, N. CO2 supply in the biooxidation of an enargite-pyrite gold concentrate. Biotechnology Letters 20, 257–259 (1998). https://doi.org/10.1023/A:1005377919131

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