Bio-beneficiation refers to the removal of undesirable mineral component from an ore by microbes, which bring about their selective dissolution thereby enriching the desired mineral constituents in the solid ore matrix. Preliminary screening of the mine water sample from bauxite ore deposits in Jamnagar, India was done and Bacillus polymyxa was isolated from it. Bauxite which is an economically important mineral is used in the extraction of aluminium and in the manufacture of refractories. The mined ore needs to be beneficiated and the major two impurities in bauxite ore are iron and...