Abstract
Water pollution due to the desertion of enormous volume of effluent like synthetic dyes
mostly azo dyes from the textile dyeing industries has become an alarming trend in the
present world. Biological degradation of synthetic dye is gaining popularity because
of its cost effectiveness and ecofriendly procedure. Hence, the present study was aimed
to isolate and identify the indigenous azo dye decolorizing bacteria from dyeing
industry effluent and to assay their dye decolorization potential in order to use them as
an efficient bio-agent for decolorizing and mineralizing toxic azo dyes. Thirty
indigenous bacterial colonies were isolated initially from which eight bacterial isolates
were selected by further screening method, exhibiting 10% Novacron Red SB
decolorization in semi-solidified screening medium. The decolorizer isolates were
identified upto species as Bacillus alvei, Bacillus polymyxa, Corynebacterium rathayi,
Staphylococcus aureus, Zymomonas anaerobia, Bacillus megaterium, Aerobacter
aerogenes and Micrococcus conglomeratus on the basis of their morphological,
cultural, physiological and biochemical characteristics. The maximum decolorization
by the isolates was achieved with 5% dye concentration at 37°C temperature and pH 9
and peptone as co-substrate. So, this study demonstrates that the selected eight
indigenous isolates can be used as efficient biological agent for the removal of toxic
industrial novacron dyes by maintaining the above mentioned optimum value of the
process parameter.
Farhana Hussain, Reazul Karim, Fahmida Hossain, Faisal Hasan. (2018) Isolation, identification and characterization of dye degrading bacteria from dyeing industry effluent and degradation process optimization against Novacron Red SB, Asian Journal of Agriculture and Biology, Volume 6, Issue 4.
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