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Abstract
The combination of an activated sludge process with powdered activated carbon can enhance the process efficiency of wool‐dyeing wastewater treatment. In addition to decolorization by direct adsorption, the powered activated carbon can also support the growth of activated sludge as a medium. Thus the biomass of the activated sludge increased significantly. The experimental results demonstrated that the combination of the activated sludge with powdered activated carbon was able to effectively decolorize the wool‐dyeing wastewater. When the biomass content was 2 g/L, and powdered activated carbon content was 2g/L, the decolorization yield reached 86%. The synergistic mechanism was further explored.