Anaerobic Biodecolorization of Remazol Dye by a Strain of Enterobacter Isolated from Textile Sludge

Enterobacter GY-1 gained from a lab scale anaerobicanoxic-aerobic (A2O) process treating textile effluent can effectively decolorize remazol dye.Under anaerobic condition,91％ of this remazol dye is decolonzed,which is much higher than under aerobic condition.The optimum pH is 7 and the optimum temperature is 35 ℃ for the rcmazol dye decolorization by GY-1.Anthraquinone dyes and monoazo dyes are decolorized more efficiently by GY-1 than other dyes tested decolorized.GY-1 can not decolorize the remazol dye when it is the sole carbon source.Microbial cometabolism and decolorization of dye take place in the presence of some other carbon source called cometabolic substrate.The cometabolic substrate can be glucose,starch,peptone,beef extract,etc.The change of molecular structure of the dye before and after decolorized by GY-1 is studied by UV-Vis absorption spectrum.The results indicate that its molecular structure is changed evidently.