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BIODEGRADATION OF SYNTHETIC DYES BY ASPERGILLUS TERREUS INOCULATED ON SOLID MEDIA

V. Ramamurthy, G. Umamaheswari

Water pollution caused by industrial waste discharges has become an alarming trend worldwide, while dye industries are considered as the most polluting among all others. In recent years, bio-treatment took attraction in removing the unwanted colour and toxicity of dyes than other conventional treatment processes. The release of dyes in to environment is of great concerned due to color, toxicity, mutagenicity and carcinogenicity of the dye, considerable attention has been given in evaluating the capability of microorganism in decolourisation and degradation diazo dye. The present study fungi were inoculated on different solid media to attain biodegradability of a diazo dye used for the coloration of paper products. For the solid, to be employed as media, special characteristics are needed with regards to adsorption capacity for concentrating substrate within the cell environment and an adequate particle size and surface texture for assuring fungal colonization. These factors were in different pH, temperature, incubation period, inoculum sizes, carbon sources, nitrogen sources and different concentrations of yeast extract. In the present investigation the ability of heat killed fungus Aspergillus terreus to adsorb the dyes Methylene blue and Congo red was investigated. The removal of the dyes Congo red and Methylene Blue from aqueous solutions on the fungal A. terreus was demonstrated by a series of batch experiments