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Adaptation and Evolution of Microbial Consortia in a Stirred Tank Reactor Bioleaching System: Indigenous Population versus a Defined Consortium

To participate in the investigation concerning these key questions, the bioleaching of a cobaltiferous pyrite by two different microbial consortia was studied. The first was an indigenous population taken from industrial bioreactors used to treat a cobaltiferous pyrite at the Kasese Cobalt Company site in Uganda [2]. The second was a defined consortium comprising four organisms which had been found to dominate the indigenous population. These organisms had been maintained in synthetic media as pure cultures in order to observe whether they would loose any adaptational advantages accrued during the period spent in the bioreactor system.