[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