The efficiency of indigenous and designedconsortia in bioleaching stirred tank reactors - BRGM - Bureau de recherches géologiques et minières Access content directly
Journal Articles Minerals Engineering Year : 2011

The efficiency of indigenous and designedconsortia in bioleaching stirred tank reactors

Abstract

The efficiency of bioleaching is dependant on the establishment of an active microbial community. There is debate as to whether an indigenous microbial community is superior to one composed of microbial strains selected for specific physiological traits. The bioleachingefficiency of three microbial communities was studied: the indigenous community of a commercial bioleaching system (KCCL), a reconstituted consortium of the four major organisms which comprise KCCL that had been 'un-adapted' through a period of continuous maintenance in synthetic media (KCCR) and a specifically designedconsortium of bioleaching organisms (KCCD). Acidithiobacillus caldus was unable to re-establish itself in the reconstituted, un-adapted consortium. However, the bioleaching rate of this consortium improved over time, and its overall performance was very similar to that of the indigenous community. This was despite the absence of an obligate sulfur-oxidising species, which resulted in the generation of substantially less acid. The performance of the designedconsortium was poor, and the results implied that bioleachingconsortia (mesophiles or moderate thermophiles) cannot be assembled 'off-the-shelf', at least not without a substantial period of adaptation.

Dates and versions

hal-00681106 , version 1 (20-03-2012)

Identifiers

Cite

Christopher G. Bryan, Catherine Joulian, Pauline Spolaore, Hafida El Achbouni, Sylvain Challan-Belval, et al.. The efficiency of indigenous and designedconsortia in bioleaching stirred tank reactors. Minerals Engineering, 2011, 24 (11), pp.1149-1156. ⟨10.1016/j.mineng.2011.03.014⟩. ⟨hal-00681106⟩

Collections

BRGM BRGM-DO
68 View
0 Download

Altmetric

Share

Gmail Facebook X LinkedIn More