decolorization performance, giving 82 and 45% decolorization after 24 h of incubation, respectively (data not shown). Decrease in the decolorization rates in Lysinibacillus sp. RGS probably due to the toxic effect of dyes and accumulation of large quantity of metabolites after decolorization of high concentration of dye followed by their adverse effect on the enzymes involved in decolorization (2,12).