The influence of the aerobic impact by strains of bacteria Pseudomonas aeroginosa LMG 1242, Pseudomonas moorei and Delftia tsuruhatensis on the structure and the sorption properties of Berezovsky brown coal was studied. The properties of products of aerobic impact by these strains of bacteria and Acinetobacter calcoaceticus PMBC In-4833 were compared. It was shown that products of the aerobic impact by strains of bacteria Pseudomonas moorei and Delftia tsuruhatensis on brown coal are the most effective in the sorption of chromium from aqueous solutions.