Pollution Research Paper

Vol 39, Issue 2, 2020; Page No.(187-195 )

EFFECT OF MIXED BACTERIAL CONSORTIA FOR DE COLORIZATION AND DETOXIFICATION OF AN AZO DYE: CI DIRECT BLUE 201 TEXTILE DYE

E.M.M.S. EKANAYAKE AND PATHMALAL M. MANAGE

Abstract

Synthetic textile dyes generated from textile industry, has become a severe environmental problem due to the xenobiotic properties and toxicity of the dyes. The present study was focused on the potential application of different bacterial consortium consists with Alcaligenes faecalis (MK166784), Micro coccus luteus (MK166783) and Staphylococcus warneri (MK256311) in A-1 (A. faecalis, M. luteus and S. warneri), A-2 (A. faecalis and M. luteus), A-3 (A. faecalis and S. warneri) and A-4 (M. luteus and S. warneri) consortia for the de colorization of CI Direct Blue 201, sulfonated azo dye. Among the different bacterial consortia tested, the consortium A-2 was found to be the best bacterial consortium for the de colorization of CI Direct Blue 201 dye, than the mono cultures of bacteria employed itself. The consortium (A2) achieved complete de colorization of CI Direct Blue 201 textile dye at 48 hrs of incubation under static conditions. Further, it was found that the bacterial consortium A-2 utilized the dyes efficiently with the supplement of tryptone and peptone as the co substrates in modified Mineral Salt Medium. Results of the phytotoxicity assay confirmed that the dye was detoxified after the treatment. Thus the treated dye contained water can be used for agrarian purposes.

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