Microbial Decolorization Treatment on Printing and Dyeing Wastewater

Mixed bacterial strain was isolated from printing and dyeing wastewater and the sludge by concentration method. It can be used to treat printing and dyeing wastewater by decolorization After being cultured. There are distinct effects under the anaerobic condition with mixed bacterial strain. The best conditions are 0.45g/l of carbamide, 0.25g/l of yeast, 30 degree of temperature, 7 of pH, and 1.25 percent of inoculation. Average decolorization rate is more than 70 percent with activated char as stable carrier of the bacterial strain when the rate of flow is 6 ml/min.