Decolorisation of Reactive Voilet-1 by Novel Isolate Bacillus Cereus Strain CMGS-4
- 1Dept of Microbiology, Gulbarga University, Kalaburagi, Karnataka, India
- 2Dept of Microbiology, Gulbarga University, Kalaburagi, Karnataka, India
- 3Dept of Microbiology, Gulbarga University, Kalaburagi, Karnataka, India
Int. Res. J. Environment Sci., Volume 5, Issue (9), Pages 45-54, September,22 (2016)
Microorganisms play an important role in biodegradation of pollutants including recalcitrant azo dyes. Out of 20 bacterial isolates, bacillus cereus strains- CMGS-4 isolated from textile mill effluent, Sholapur, Maharashtra gave excellent result, in the utilizing reactive violet-1 as a sole source of carbon. The strain identified as Bacillus cereus sps (Gene bank accession num-633716), by conventional and 16S rRNA sequencing methods. Optimized the biotic and abiotic parameters for the maximum decolorization of RV-1 by bacterial isolate. Organism decolorized initially added RV-1 up to 200mg/L within 12 hours and could decolorized more than 70% at 800mg/L and 60% when dye concentration increased to 1000mg/L within 24 hours. The isolate had a capacity to decolorize more than 80% in a wide range of pH 7 to10 and temperature (25 to 45o C) however it decolorizes RV-1 better only in 1% salt concentration and also shown decolorization of five structurally different azo reactive dyes in mixed (in equal quantity) within 24 hrs. So it could be a better candidate for the decolorisation of textile effluents containing reactive azo dyes.
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