Review Article
Exploitation of Bacterial Activities in Mineral Industry and Environmental Preservation: An Overview
Table 1
Flotation, bacteria leaching, and combinations of bacterial conditioning and flotation of −28 mesh coal containing 2.88% pyritic sulfur [
69]*.
| Process | Coal product specifications | Coal yield, % | Pyritic sulfur, % | Pyritic sulfur removal, % | Ash, % | Calorific value, kcal/kg |
| Regular conditioning and one-stage flotation | 73.74 | 1.29 | 66.76 | 22.5 | — | Bacterial leaching (10 days leaching) | 100 | 1.42 | 56.6 | 30.47 | 5260 | Bacterial conditioning (4 hours) and one stage flotation | 78.0 | 0.825 | 77.63 | 18.5 | 6361 | Bacterial conditioning (4 hours) and 3-stage flotation | 34.36 | 0.68 | 91.78 | 12.03 | — |
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*pH = 2.0 for flotation conditioning and for bacterial leaching, and pH = 9 for all flotation stages.
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