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CDAF system Our pressurization units incorporateunique design features into DAF unit to provide a uniform flow of air bubbles for optimum operation and economy. The pressurization type and flow rate are selected foreach individual application. Used exclusively on all our DAF units, the recycled flow pressurization system generates 10-100micron-sized air bubbles help to eliminate detrimental coalescing. A single-stage pressureization pump and air compressor are used to pressurize a portion of clarified effluent in a saturation tank. As a result ofhigh saturation efficiency, the cost of pumps, saturation tank and other pressure system components is reduced. Once saturated with air, the pressurized clean liquid is returned to the raw waste flow for injection into the flotation unit. A unique back pressure valve is specially designed to maintainthe properpressurein the pressurization tank and to aid in the formation of minute air bubbles. Pressurized flow is released in a conical pattern inside the flotation unit, producing thorough mixing with minimal turbulence. Loss of dissolved air in external piping of distribution systems is prevented. The air water-solids mixture is uniformly distributed across the flotation tank by action of the inlet diffusion chamber. Dissolving efficiency of the pressurization tank provides 80% or greater saturation. The tank is specially designed to reduce the exit velocity of the pressureized recycle flow to insure that all free air is removed from the liquid prior to leaving the tank. This feasure insures that turbulence caused by large bubbles is reduced and that the micron-sized