Decolorization of methyl red by selected bacteria in industrial waste sludge

Azo dyes are aromatic compounds characterized by one or more azo bonds $(R_l-N=N-R_2)$. More than 800,000 tons of dyes are produced annually worldwide, of which 60-70% are azo dyes. During manufacturing, an estimated 10-15% is released into the environment. Aside from their negative aesthetic effects, certain azo dyes have been shown to be toxic and, in some cases, these compounds are carcinogenic and mutagenic. To establish biological wastewater treatment of azo dye, it is essential to discover azo dye-degrading microorganisms. In this report, sludge-contaminated with dyes were gathered through wastewater outlets from the industrial regions. The following to separation of bacteria within them, bacteria which decolorize methyl red, a azo dye, were selected and destined.