ABSTRACT
Three different soil samples were collected from the vicinity of textile dye manufacturing industries and waste disposal sites of various areas in Tiruppur district, Tamil Nadu, India, and were screened for an efficient discoloring and degradation isolate. The isolated organisms were identified as Aspergillus niger, Aspergillus flavus, and Fusarium sp. The optimum conditions for the different growth parameters, namely temperature, pH, carbon sources, and nitrogen sources, were analyzed for all the isolates. The decolorization ability of the isolates at varying concentrations of the dye was analyzed, and the percentage of color removal was calculated. The maximum decolorization has occurred at 30 ppm. The efficiency of dead fungal biomass in removing the dye by biosorption was analyzed, and Aspergillus flavus was the most efficient biosorbent among the three fungal isolates that were observed. Physicochemical parameters of untreated textile dye industry effluent such as color, odor, pH, electrical conductivity (EC), total suspended solid (TSS), total dissolved solids (TDS), biological oxygen demand (BOD), and chemical oxygen demand (COD) were analyzed, and chromium, lead, copper, nickel, phenolic compounds, and oil and grease (surfactants) contents were estimated and their degradation in the effluent using native and non-native fungi was examined. Since the effluent had high organic load, microbes (fungi) present within the effluent were identified and isolated, and the biotreated water can be reused for the agricultural and aquacultural purposes.
