矿业科学技术学报（英文版）
礦業科學技術學報（英文版）
광업과학기술학보（영문판）
Lnternational Journal of Mining Science and Technology
2013年
6期
822-829
,共8页
Bioleaching%Molybdenite concentrate%Copper removal%Mesophilic and extreme thermophilic%microorganisms
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).
