Acidophiles in bioreactor mineral processing

  title={Acidophiles in bioreactor mineral processing},
  author={Paul R. Norris and Nicolas P Burton and N. A. M. Foulis},
Abstract Mineral processing in bioreactors has become established in several countries during the past decade with industrial application of iron- and sulfur-oxidizing bacteria to release occluded gold from mineral sulfides. Cobalt extraction in bioreactors has also been commercialized, and development of high-temperature biooxidation of copper sulfides has reached pilot-plant scale. A variety of potentially useful mineral sulfide-oxidizing thermophiles have been recognized, but the most active… 
Heavy metal mining using microbes.
The use of acidiphilic, chemolithotrophic iron- and sulfur-oxidizing microbes in processes to recover metals from certain types of copper, uranium, and gold-bearing minerals or mineral concentrates
Biomineralization of metal-containing ores and concentrates.
The microbiology of biomining: development and optimization of mineral-oxidizing microbial consortia.
Theoretical and pragmatic aspects of assembling microbial consortia to process different mineral ores and concentrates, and the challenges for using constructed Consortia in non-sterile industrial-scale operations are discussed.
Characteristics and adaptability of iron- and sulfur-oxidizing microorganisms used for the recovery of metals from minerals and their concentrates
The remarkable adaptability of these organisms is assisted by several of the processes being continuous-flow systems that enable the continual selection of microorganisms that are more efficient at mineral degradation.
Microbial leaching of metals from solid industrial wastes
This mini-review focuses on the acidophilic microbial diversity and application of those microorganisms toward solid industrial wastes.
Genomics, metagenomics and proteomics in biomining microorganisms.
Acidophilic bioleaching: A Review on the Process and Effect of Organic–inorganic Reagents and Materials on its Efficiency
ABSTRACT Bio-hydrometallurgical applications have been receiving more attention globally for processing of several metal bearing wastes. Developments in bioleaching enable this technique to be
The resilience and versatility of acidophiles that contribute to the bio‐assisted extraction of metals from mineral sulphides
In this paper, a brief outline is presented on acidic ferric ion oxidation of mineral sulphides for the extraction of metals in both stirred tank reactors for mineral concentrates and heaps for


Mineral sulphide oxidation by enrichment cultures of novel thermoacidophilic bacteria
Enrichment culture of hot spring water samples with pyrite as substrate has provided acidophiles with novel growth characteristics: with these bacteria, the range of conditions under which rapid
The Design and Operating Practice of Bacterial Oxidation Plant Using Moderate Thermophiles(The BacTech Process)
It has been most satisfying to see the emergence of bacterial leaching technology from laboratory experimentation through to commercial acceptance. The use of moderate thermophiles for commercial
Thermophiles and Bioleaching
Acidophilic microorganisms that oxidize iron and sulfur can be exposed to high temperatures in geothermal environments and in some heaps of ores and mine wastes and may succeed one another as exothermic oxidation reactions increase the temperature in the industrial heaps.
Characteristics of Sulfobacillus acidophilus sp. nov. and other moderately thermophilic mineral-sulphide-oxidizing bacteria.
Several isolates of Gram-positive, acidophilic, moderately thermophilic, ferrous-iron- and mineral-sulphide-oxidizing bacteria were examined to establish unequivocally the characteristics of
Acidimicrobium ferrooxidans gen. nov., sp. nov.: mixed-culture ferrous iron oxidation with Sulfobacillus species.
The capacity of this species to fix CO2 from air was greater than that of iron-oxidizing thermoacidophiles of the genus Sulfobacillus, which required an enhanced CO2 concentration for optimum autotrophic growth.
The BIOX® Process for Biooxidation of Gold-Bearing Ores or Concentrates
GENCOR S.A. Ltd. has pioneered the commercialization of biooxidation of refractory gold ores. Development of the BIOX® process started in the late 197os at GENCOR Process Research, in Johannesburg,