A Aeration → Flocculation → Sedimentation → Recarbonation → Filtration → Disinfection
B Aeration → Sedimentation → Flocculation → Filtration → Recarbonation → Disinfection
C Flocculation → Aeration → Recarbonation → Sedimentation → Filtration → Disinfection
D Sedimentation → Flocculation → Aeration → Filtration → Recarbonation → Disinfection
