Sunday, April 29, 2007

Screening microorganisms to biodegrade different classes of textile dyes solution and reutilization of the wastewater

Ana M. Blosfeld1, Ivonete O. Barcellos2, Jurgen Andreaus2, Joabe de L. Zortea2, and Carla Trentini2. (1) Iptb, University of Blumenau, Rua São Paulo, 3250, Blumenau/SC, Brazil, (2) Chemistry Dept, University of Blumenau, Rua Antonio da Veiga, 140, Blumenau/SC, Brazil

The reutilization of the wastewater in a textile industry will represent an enormous save in terms of water consume considering that it is use 150 liter of water/ kg of processed fabric material. If it would be possible to remove totally the dyes from the textile wastewater, this could be reuse in several others textile processes, promoting this way a save and friendly environmental use of water supply. The purpose of this study is screening microorganisms capable to biodegrade different classes of textile dyes solution and the reutilization of the wastewater. Different solutions of textile dyes classes were study in solid and liquid culture media, using Phanerochaete chrysosporium, Pleurotus ostreatus e Trametes versicolor   to promote the biodegradation. For the solid culture medium was used malt extract 2%, agar 1,5% and for the liquid culture medium was used   different media:  malt extract 2%, 1% and 0,5%; rice bran 1%, 10% sugar cane bagasse.  To all culture media was added   textile dye solution (0,2 mg/L). All experiment was run at 28°C and the liquid culture flask at 180 rpm.  After 7 days of incubation, the best result was obtained with Phanerochaete chrysosporium in solid culture when the reactive dye solution was used, with a 98,07 % efficiency of biodegradation, and Trametes versicolor in liquid culture   with a 99,97% efficiency of biodegradation.




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