| Treatment level | Treatment process | Main process |
|---|---|---|
| Primary | Sedimentation | Bar screen, filter screen, primary sedimentation tank |
| Coagulation sedimentation (air flotation) | Bar screen, filter screen, coagulation sedimentation (air flotation) | |
| Secondary（1） | Aerobic oxidation | Aerobic biological reaction tank, secondary sedimentation tank |
| Anaerobic-aerobic oxidation | Anaerobic tank, (secondary sedimentation tank), aerobic biological tank, secondary sedimentation tank | |
| Tertiary | Coagulation sedimentation (air flotation) （2）3） | Coagulation sedimentation (air flotation), (filtration) |
| Fenton oxidation | Advanced oxidation, coagulation sedimentation |
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