National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Azo dyes, which are characterized by azo bonds, are a predominant class of colorants used in tattooing, cosmetics and consumer products. As per the requirement for dyestuff, dyed clothing in the effluent is less susceptible to acids, bases, and oxygen. Thus, conventional chemical and physical methods are not efficient in degrading the dyes. Some microorganisms have the capability to utilize the dyes as an energy source. These dyes are metabolized by bacteria to colourless aromatic amines or non-toxic compound bye enzymatic activity. Wastewater from textile industries poses a high environmental impact and their needs to be treated before discharged into the environment. The present study deals with the degradation of Reactive black GDN by different bacterial cultures isolated from a contaminated site. Amongst 5 cultures, the isolate 4 displayed 96% decolourisation of Reactive black GDN (100 mgl-1) in 24h to 72 h. The colour removal efficiency of the isolate was further improved by optimizing various parameters. The decolourisation of the dye was 1.9 times higher under static as compared to shaking condition. The pH 7.0 and 37oC temperature were found to be optimum for the decolourisation of the dye. The isolate was able to decolorize the dye in the range of 50-500 mg l-1.
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