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 DAF water treatment plants are intended to eliminate SS (suspended solids), BOD (bio-chemical oxygen demand), oils and greases from a wastewater stream. Impurities are eradicated through the usage of a dissolved air in water solution manufactured by inserting air under pressure into a re-cycle stream of clarified DAF effluent. DAF delivers the desirable energy for effective flotation in the form of exceptionally fine air bubbles which come to be attached to the suspended solids to be eliminated. The magnetism between the air bubbles and suspended particles is the outcome of adsorption forces that are functional characteristics of the suspended particle surface, or physical entangling in the particle. This attachment of bubbles to the suspended particles decreases the density of the suspended particle causing in amplified buoyancy, thus achieving effective flotation. Chemical conditioning is every so often utilized to escalate the effectiveness of the dissolved air flotation procedure. Contaminants are concentrated in the particle that gathers on the surface, known as the float or skimming or sludge.

This re-cycle stream is then united and blended with inward waste water in an inner contact compartment where the dissolved air releases out of solution in the form of micro-sized bubbles that fasten to the impurities. The bubbles and impurities upsurge to the surface and form a floating bed of containments that is eradicated by a surface skimmer into an inner hopper for advance treatment.