In the process of sweater production,the problems existing in the discharge of wastewater were that the amount of wastewater was variable,and that the concentration of contaminant was high in the wastewater.The treatment process of air floatation-anaerobic acidification-contact oxidation-activated carbon adsorption was adopted to treat the wastewater.The removal rates of COD,sulfide and chroma could reach 96.85%,97.3% and 94% respectively.Effluent after treatment could comply with the direct discharge in th...