Sunday, May 4, 2008
2-41

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

Ana M. Blosfeld1, Ivonete O. Barcellos2, Jürgen Andreaus2, Carla Trentini2, and Luana M. Chiarello2. (1) Iptb, University of Blumenau, Rua São Paulo, 3250, Blumenau/SC, Brazil, (2) Chemical Department, 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 used 70-100 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. After 7 days of incubation, the best result was obtained with Trametes versicolor in liquid culture   with a 99,97% efficiency of  the color biodegradation. This treated solution was used again in the textile dying process, using a 100% cotton fabric material pre-bleached and with 3 different dying solution (blue Procion H-EXL, yellow Procion H-EXL and red Procion Crimson H-EXL), according the manufacture recommendation (Dystar). Even though the culture media color interfered in the results, asking for 20% of dilution, the final DE value was 0,28%.  Considering that the average rate of DE from the textile industry  dying process can be up to 1,1, the results are very good in terms of color reproductively  and specially excellent in terms of saving 80% of the good water by reusing the treated textile wastewater.


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