Biodegradation of synthetic textile dyes reactive red 195 and reactive green 11 by Aspergillus niger grp: An alternative approach

Abstract

Textile dyes (reactive red 195 and reactive green 11) were selected for biodegradation studies by Aspergillus niger grp using synthetic wastewater. Addition of glucose (1 g % w/v), ammonium sulphate (0.2 g % and 0.3 g % respectively for reactive red 195 and reactive green 11) favoured degradation. Optimum inoculum (size 1 g %, pH 7.0 and temp. 30 °C) was prepared for degradation of both the dyes. Static conditions favoured dye decolarization than shaking conditions. Under optimized conditions, degradation by Aspergillus niger grp was found to be: reactive red 195, 93.0; and reactive green 11, 80 %. Degradation of dyes was confirmed by UV- Spectrophotometric and TLC analysis. This indigenous isolate could be a potential organism for developing an efficient and effective technology for bioremediation of textile wastewater effluents carrying these dyes.