DECOLORIZATION OF REMAZOL RED B BY HALOMONAS SP. PTCC1417 ISOLATED FROM URMIA LAKE: OPTIMIZATION BY TAGUCHI METHODOLOGY

Background and Aim:Azo dyes account as the most dyes of all textile dyestuffs produced, and are the most common dye in textile industry. Azo dyes-containing effluents from these industries have caused serious environment pollution.Compared with chemical/physical methods, biological processes have received more interest.Methods:In this study, we investigated effects of four factors including temperature, pH, dye concentration, salt concentration on decolorization of Remazol Red B by Halomonas sp. PTCC1714. The optimization of dye decolorization in 16 experiments with different conditions was statistically analyzed using Taguchi design in Qualitek-4 software.Results:The results showed that Halomonas sp. PTCC1714 was able to decolorize Remazol Red B in varying salt at 5–20% (w/v), pH at 5-9, dye concentration at 100-5000 ppm and temperature 31-40 ˚C. The optimum factor levels were a dye concentration of 100 ppm, salt concentation 5 % (w/v) and pH 9 and temperature 31˚C. The predicted value obtained for dye decolorization under these conditions was about 94%.Conclusion:We can conclude that Halomonas sp. PTCC1714 has a high potential for decolorization of Remazol Red B from textile wastewater in different conditions.

Keywords:

Halomonas , Azo dyes , Rimazol Red B , Decolorizatin