Streptomyces cavourensis Strain RD7-Mediated Decolorization of Aromatic Industrial Dye

Economical and bio-friendly approaches are needed to decolorize dye-contaminated effluent causing toxic, carcinogenic and genetic effects. A novel actinomycete strain capable of decolorizing industrial effluent was isolated from Mahuva, western site of Gulf of Khambhat (GoK), Gujarat, India. The isolate was identified as Streptomyces cavourensis strain RD7 and was found to be potential in decolorizing methylene blue (MB) in presence of nitrogen sources like yeast and beef extracts. It was found that when 100 (mg/L) MB was supplemented with only 1.0% yeast extract, 48 and 86% decolorization was observed after 24 and 48 h of incubation, respectively. The decolorization of industrial effluent supplemented with 1.0 and 0.5% yeast extract was 49 and 22%, respectively, by S. cavourensis strain RD7 after 120 h. MB decolorization mechanism was revealed using analytical techniques.