Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

DECOLORIZATION OF ROSE BENGAL DYE BYASPERGILLUS NIGER ISOLATED FROM SOIL CONTAMINATED WITH DYE EFFLUENTS

CH. L.R. JAIDEV, G. NARASIMHA AND D.V.R. SAIGOPAL

Abstract

Effects of dye effluents released from weavers houses on soil physico-chemical and biological properties were studied in the present study. Disposal of water contaminated with dye water altered the physicochemical and biological properties of soil like pH, water holding capacity, electrical conductivity and microbial population. Decreased bacterial and fungal populations were observed in polluted soil than control. One of the fungal strains which show the dye decolorization property was isolated and identified as A. niger. The decolorization property of the A. niger was estimated by percentage of rosebengal dye decolorization in the liquid medium. Rose Bengal dye at 100 ppm in the liquid medium was effectively decolorized by the fungal strain A.niger within the 24 hours of incubation.