Investigations were carried out for biotechnological leaching of manganese from pyrolusite ore using Aspergilus niger.Strian of Aspergilus niger PCSIR-06 was isolated from pyrolusite ore collected from wahd area of Khuzdar District, Balochistan, Pakistan. The growth characteristics were investigated in term of final pH, biomass and total acid produced by the fungus in both shaking and surface culturing conditions. Bioleaching of manganese from low grade pyrolusite ore was carried out in shake cultures by applying Aspergilus niger PCSIR-06. Effects of various parameters in situ leaching of pyrolusite ore such as sucrose concentration, pulp density and inoculum size were investigated. Maxiu, leaching of manganese (85.39 %) was achieved at 19 % sucrose, 1 % pulp density and 10 % inoculum in a period of 12 days.
SHEREEN GUL ,MUJEEB UR REHMAN ,MOHAMMAD ZAHOORUL HAQ ,S A KAYANI ,
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