ABSTRACT
The extent of Bioleaching phenomenon, over the years have been observed, not only for recovery of precious metals but to a widespread other emerging applications. There is requirement for less costly and more environmentally feasible processes. Further advancement is necessary regarding technical and biological features. The latter incorporates increasing the rate of leaching and the acceptance of the potential microbial strains to heavy metals. Microbes properly function only when the waste components permit them to produce nutrients and energy for the growth of more cells. When unfavorable conditions strike, their capacity of degradation is reduced. In such conditions, genetically engineered microorganisms have to be used, although stimulating indigenous microorganisms is preferred.
