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Related Experiment Videos

Acidophiles in bioreactor mineral processing.

P R Norris1, N P Burton, N A Foulis

  • 1Department of Biological Sciences, University of Warwick, Coventry, UK. P.R.Norris@warwick.ac.uk

Extremophiles : Life Under Extreme Conditions
|May 11, 2000
PubMed
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Bioreactor technology using iron and sulfur-oxidizing bacteria is established for gold recovery from sulfides. Further development in biooxidation for cobalt and copper extraction is ongoing, with a need to fully characterize active thermophilic strains.

Area of Science:

  • Biotechnology
  • Environmental Science
  • Extractive Metallurgy

Background:

  • Mineral processing using bioreactors has gained industrial traction over the last decade.
  • Specific applications include gold recovery from mineral sulfides using iron- and sulfur-oxidizing bacteria.
  • Commercialization has been achieved for cobalt extraction and pilot-scale development for copper sulfide biooxidation.

Purpose of the Study:

  • To review the established and developing applications of bioreactor technology in mineral processing.
  • To highlight the potential of thermophilic microorganisms in sulfide biooxidation.
  • To identify the need for further characterization of highly active strains.

Main Methods:

  • Review of industrial applications and pilot-plant scale developments.

Related Experiment Videos

  • Identification and recognition of mineral sulfide-oxidizing thermophiles.
  • Analysis of the current state of characterization for active microbial strains.

    • Main Results:

    • Industrial application of biooxidation for gold, cobalt, and copper sulfide processing is established or in advanced development.
    • A range of mineral sulfide-oxidizing thermophiles have been identified.
    • The most active strains among these thermophiles remain incompletely characterized.

    Conclusions:

    • Bioreactor-based mineral processing, particularly biooxidation, is a proven and advancing technology.
    • Thermophilic microorganisms offer significant potential for efficient metal extraction.
    • Comprehensive characterization of the most active thermophilic strains is crucial for optimizing future bioleaching processes.