Dissolved Air Floatation (DAF) is a water treatment process that clarifies wastewater by removing suspended solids. The removal is achieved by dissolving air underpressure in the wastewater and then releasing the air at atmospheric pressure in a flotation tank. The released air forms tiny bubbles which adhere to the suspended matterto float to the surface of the water where it is then removed by a skimming device. Chemical are added to the feed water to improve solids removal.
Any solids that don't float will sink to the "V" bottom of the DAF tank. Settled solids are concentrated and discharged by an automatically controlled pneumatic drain valve.
