Screening and characterization of bacteria for decolorizing of Azo Dye

Abstract

Azo dye is a mainly pollution, the concentration of azo dye from the waste water is very high, it is difficult to decolour and degrade azo dye in nature. Bacteria have the ability to decolour and degrade, it can be biosorption the dye. Four strains were screened and identificated by the morphology of colonies and individual observation, Gram staining, flagella staining, spores formation experiment, physiological and biochemical reactions, these are belong to Bacillus, kurlhia, Klebsiella, the decolorization rate of four strains was more than 70%.