Authors : Rayate P. S and Date D.W.
Page Nos : 240-243
Description :
A large group of chemical dyes are manufactured on an industrial scale with an annual production of over 7×105 metric tons. Reactive dyes are important chemical pollutant from textile industries. These dyes are discharged from textile and dye industries directly into water bodies and responsible for toxicity and carcinogenicity. The species of white rot fungi, T. hirsuta was evaluated for its ability to decolorize dyes, reactive pink and reactive and direct effluent. Laccase is lignolytic enzyme extracellularly secreted by white rot fungi. The laccase activity was measured using both solid and aqueous state assays. The effective decolorization was started after 72 hrs of incubation, with different concentrations 5 mg/l, 10mg/l, 15mg/l, 20mg/l & 50mg/l & complete decolorization was observed in higher concentration within 9 days of incubation. A toxicity study shows that effluent after treatment was less toxic as compound to untreated effluent. The absence of zone of inhibition on agar plates indicated that the fungal degraded dye metabolites are nontoxic to beneficial micro-flora. Therefore, T.hirsuta has promising potential in color removal from textile wastewater containing reactive dyes.
