This project is located in Ruicheng, Shanxi Province. The treatment objects are concentrated condensed water and container washing water from the company’s traditional Chinese medicine extraction process. The treatment scale is 200m3/d; the designed inlet water quality is COD: 1500mg/L, BOD: 600mg/L, SS : 100mg/L, ammonia nitrogen: 60mg/L; the treated water quality meets the first-level discharge standard of "Integrated Wastewater Discharge Standard" GB8978-1996, COD: <100mg/L, BOD: <20mg/L, SS: <70mg/L , Ammonia nitrogen: <15mg/L; using the "anaerobic + A/O + air flotation" combined process.