Bioremediation potential of textile Aspergillus flavus teak 07 Against textile dye and their toxicity assessment

ABSTRACT

The study focused on the isolation, decolourization efficiency of the indicator organism and their toxicity assessment. The predominant isolate was morphologically identified, characterized by 18SrRNA and named as Aspergillus flavus TEAK 07. The indicator and the reference fungi Aspergillus flavus MTCC 1883 strain were assessed for their efficacy to decolorize the reactive Red 120. The indicator organism Aspergillus flavus TEAK 07 expressed the best decolorization efficiency than the reference isolate. The various factors affecting Reactive red decolonization were optimized, include temperature, pH, different carbon and nitrogen sources, and different agro substrate. Results showed that pH 5.5 and temperature of 28ºC was optimal. In addition to this, glucose  and ammonium were found to be a better carbon source, and nitrogen source, the initial inoculum concentration of 1% and 0.1 mg/ml of initial dye concentration was found to give maximum decolourization. Vigna mungo seed germination tests proved, decolorized dye was less toxic than the original dye.

 Keywords:  Reactive dye 120, Aspergillus flavus TEAK 07, Decolorization, Seed Germination.

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