by gathering these together to form floc. Sedimentation, flotation and/or filtration systems are then used to separate the floc (see the section sedimentation, filtration, as well as flocculators – settling ...  Settling, Flotation, Filtration, Preoxidation, Preozonation, Coagulation-flocculation ...  Settling Flotation Filtration Preoxidation Preozonation Coagulation-flocculation ...  Flocculation/Sedimentation/Flotation...