For this kind of wastewater, our company adopts the process of "air flotation + hydrolytic acidification pool + biological contact oxidation method", which has the characteristics of low investment, good treatment effect and stable operation. After treatment, the effluent can reach the following water quality: CODcr≤100mg/l, BOD5≤30mg/l, SS≤20mg/l, NH3-N≤15mg/l, TN≤25mg/l, TP≤1.0mg/l.