PWS - Dissolved Gas Flotation (DGF)

The dissolved air flotation pump functions without the air saturation tank or the compressor. An impeller design creates a sub-atmospheric pressure region in the seal chamber. Gas is naturally aspirated into the seal chamber, (i.e., blanket gas on the vessel) then mixed with pumpage and compressed into micro-bubbles. The bubbles are then dissolved into the pumpage and moved through the discharge of the pump and out to the process. The bubbles are released by means of a pressure drop induced by a globe valve before entering the vessel. The gas bubbles then attach to oil droplets assisting in the water/oil separation.