Journal of Pure and Applied MicrobiologyVol. 4 No. 2

Decolorization of Textile Sulfonated Azo Dyes by Bacteria Isolated from Textile Industry Effluent, Soil and Sewage

J.J. Bhuktar¹, U. Kalia and A.V. Manwar²

¹Department of Microbiology, Institute of Science,15 Madam Cama road, Mumbai - 32, India. ²Department of Microbiology, D.S.M. college, Parbhani - 431 401, India.

Received on 09 January 2010 and accepted on 18 February 2010



Biological oxidation of organic dyes is important for textile industry wastewater treatment. Decolorization of four textile sulfonated azo dyes (Direct Blue 71, Direct Yellow12, Acid Black 210, and Reactive Black 5) by six bacteria IE1 (Citrobacter freundii) , IE2(Xenoranadus luminescence) and IE3 (Enterobacter cloace ) IE4 and IS1(Pseudomaonas species) ISEW (Enterobacter agglomerans Aerogenic strain Biotype-G2) isolated from two textile industry effluents, soil and sewage was studied. These isolates showed significant dye decolorization with a percent decolorization in range of 66.1% to 93.9% (Direct Blue 71), 26.73% to 92.46% (Direct Yellow12), 39.6% to 91.6% (Reactive Black 5), and 27% to 87.7% (Acid Black 210) under strict aerobic condition, at room temperature (RT) and neutral pH within 24h.

Keywords : Textile industry, Azo dyes, Bacteria, Soil & Sewage.