DECOLORIZATION OF PURPLE 2R BY ASPERGILLUS OCHRACEUS (NCIM-1146)R.P. HUMNABADKAR, G. D. SARATALE AND S.P. GOVINDWAR
Aspergillus ochraceus (NCIM-1146) have ability to decolorize various textile dyes Viz. purple 2R, orange TG22, yellow HE64, red HE7B and golden yellow HER was determined with Asperiillus ochraceus (NCIM-1146) by monitoring the decrease in absorbance of each dye in the culture supernatant. Decolorization performance of purple 2R with various conditions such as; different media, concentration of dye, agitation and static conditions were studied. The decrease in dye decolorization capability of mycelium was observed with increasing dye concentration in repeated batch mode. Spectrophotometric data revealed that the process involved in decolorization is through microbial metabolism but not biosorption. Phytotoxicity study demonstrated no toxicity of the biodegraded products for plants with respect to Phaseolus mungo and Sorghum vulgarae. This study suggests that Aspergillus ochraceus could be a useful tool for textile effluent treatment and the alternative to the traditional physicochemical process. importance due to their inexpensive, ecofriendly nature and less sludge producing properties (Alexander et al., 1994, Banat et al., 1996, Robinson et al.2001).
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