Azo dye decolorization by using four different psychrotolerant Bacillus species

Since the early ages, human beings have used colored materials to leave marks on their environment and following generations. In time, paints, which gained great importance with painting objects items they used, brought environmental problems them. Synthetic paints/dyes meet increasing need over time had be eliminated from environment. Nowadays, using bacteria is considered as a good solution for eliminating dyes that contain azo groups. These are in large quantities difficult decompose. The main goal of this study was decolor six different (amido black 10B, evans blue, janus green, methyl orange, red, orange G) by use four psychrotolerant Bacillus (Bacillus sp, B. cereus, mycoides, subtilis) isolates. According obtained results, it determined isolates could remove colors presenting high decolorization activity (up 98%).