Comparative performance of different white rot fungi in decolorization of acid, direct and reactivetextile azo dyes

摘要

Different white rot fungi were compared for their ability to decolorize a wide range of structurally different acid, direct and reactive azo dyes. P. chrysosporium, P. radiata and D. flavida showed better ability to decolorize the dyes compared to P.sanguineus, F. flavus and T. hirsuta on agar plates. Favourable culture conditions were identified to enhance the decolorization ability of P. chrysosporium, P. radiata and D. flavida. Shaking of culture inhibited the decolorization of amaranth by thesestrains. Under favourable conditions, more than 90% decolorization of amaranth was observed in 5 days by D. flavida. Whereas, P. chrysosporium and P. radiata required 7 and 8 days respectively for more than 90% decolorization of amaranth. D. flavida wasfound more efficient than P. chrysosporium and P. radiata. 99% decolorization of amaranth, 74% decolorization of metanil yellow, 96% decolorization of trypan blue, 63% decolorization of chlorazole black E and 42% decolorization of red M8B was observed in5 days with D. flavida. It is the first time that different white rot fungi have been compared in terms of their ability to decolorize a wide range of acid, direct and reactive azo dyes. The results would help in identifying an efficient culture for effective decolorization of these azo dyes.