Shandong Pharmaceutical Park Wastewater Treatment Plant 

The main process is AAO. The factory has two series in phase I and one series in phase II in operation. The actual average inflow is about 60,000 tons/day, and the treated sewage is discharged according to the discharge standard of Class A (GB18918-2002).The COD_Cr of inlet water is 200-300mg/L, the TN is 40-60mg/L, and the BOD₅ is not high due to the fluctuation of inlet water quality. According to the actual situation of inlet water quality, 3-10 tons of liquid sodium acetate carbon source with COD equivalent of about 220,000 mg/L was added to the plant for nitrogen removal every day.