Effect of the aeration mode and yeast extract on the oxidation of high-pyrrhotite sulfide ore flotation concentrate and on the composition of the acidophilic chemolithotrophic microbial community
| Autor: | P. V. Moshchanetskiy, A. V. Belyi, A. G. Bulaev, T. A. Pivovarova, V. S. Melamud, Tamara F. Kondrat'eva |
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| Rok vydání: | 2014 |
| Předmět: |
chemistry.chemical_classification
Residue (complex analysis) biology Sulfide Ferroplasma acidiphilum engineering.material biology.organism_classification Applied Microbiology and Biotechnology Microbiology Microbial population biology chemistry engineering Yeast extract Composition (visual arts) Food science Aeration Pyrrhotite |
| Zdroj: | Microbiology. 83:558-567 |
| ISSN: | 1608-3237 0026-2617 |
| DOI: | 10.1134/s0026261714050191 |
| Popis: | Optimal aeration conditions were determined and the effect of yeast extract on biooxidation of high-pyrrhotite sulfide ore flotation concentrate in the course of continuous cultivation of an acidophilic chemolithotrophic microbial community was studied in a line of four sequential laboratory reactors; the aeration rate was 3 L/(L min), yeast extract concentration was 0.02%. The gold recovery level was 96.45% at 2.23% elemental sulfur content in the solid residue. The dominant strains identified in the community responsible for biooxidation were Acidithiobacillus caldus OL13-1, At. caldus OL13-3 = At. caldus OL12-3, and an ‘Acidiferrobacter’ strain. Strains Sulfobacillus thermosulfidooxidans OL13-2 = S. thermosulfidooxidans OL12-1 and Ferroplasma acidiphilum OL13-4 = F. acidiphilum OL12-4 were isolated in pure culture and identified. |
| Databáze: | OpenAIRE |
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