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Details

Autor(en) / Beteiligte
Titel
Removal of copper from molybdenite concentrate by mesophilic and extreme thermophilic microorganisms
Ist Teil von
  • International journal of mining science and technology, 2013-11, Vol.23 (6), p.827-834
Ort / Verlag
Elsevier B.V
Erscheinungsjahr
2013
Link zum Volltext
Quelle
Elsevier ScienceDirect Journals Complete
Beschreibungen/Notizen
  • Mixed mesophilic and extreme thermophilic bioleaching were evaluated to remove copper from the molybdenite concentrate. Bioleaching tests were carried out in shake flasks and in a 50-L bioreactor. The shake flask tests were performed with different inoculum size, solids density, pH, and temperature in order to identify optimum conditions. The highest amount of copper elimination, 75% was obtained with extreme thermophilic microorganisms (at 12%inoculation, 10%solids, 65 oC and a pH of 1.5). The highest copper elimination by mesophilic microorganisms was 55% (at 12% inoculation, 5% solids, 30 oC at pH 2). The optimum conditions in shake flask tests were applied to 7 days batch tests in a 50-L bioreactor. Extreme thermophilic experiment gave the best copper elimination of 60% (at 12%inoculation, 10%solids, 65 oC and pH 1.5). Mesophilic test removed 50%of the copper (at 12%inoculation, 10%solids, 35 oC at pH 2).

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