Abstract:Taking cottonseed processing wastewater as the treatment object and the decolorization rate as the evaluation index，this research compared the decolorization effects of five decolorizers，namely activated carbon powder，activated carbon granules，alumina（Al2O3），nonpolar macroporous adsorption resin，and Polar macroporous adsorption resin，so as to determine the optimal decolorizer.The decolorization process of cottonseed processing wastewater was optimized by designing single factor experiment and response surface experiment.The results showed that the decolorization effect of activated carbon powder on cottonseed processing wastewater was better than that of other four decolorizers.Therefore，the activated carbon powder was selected as the decolorizer of cottonseed processing wastewater.Through the optimization of response surface methodology，the optimal decolorization process conditions were pH4.7，65 ℃ of decolorization temperature，and 47 min of decolorization time.Under these conditions，it was verified that the decolorization rate of cottonseed processing wastewater reached 96.29%.