Coagulation and Flocculation : In some cases, prior to DAF, a coagulant or flocculant may be add to the wastewater to facilitate the aggregation of small suspend particles into larger flocs. This helps improve the efficiency of the flotation process.
Mixing and Contact : The wastewater is introduce into a flotation tank or basin where it is mix with a recycle stream of water and/or chemicals. This mixture creates a supersaturat solution of dissolve air.
Release of Pressure : The supersaturate solution is then rapidly release into the flotation tank, causing the air to come out of solution and form tiny bubbles throughout the tank.
Bubble Attachment and Rise : The fine air bubbles rise through the tank, carrying the suspend solids and contaminants with them. The particles adhere to the bubble surfaces due to their hydrophobic nature or through physical or chemical interactions.
Float Removal : The float layer, consisting of the particles attache to the rising air bubbles, accumulates at the surface of the tank. Mechanical skimmers or weirs are used to continuously remove and collect this float layer.
Clarified Effluent : The treat effluent, now clarifie and with reduce suspend solids and contaminants, exits the flotation tank through an outlet.