Panta Rei - Chemical-Physical Treatment Unit

The Dissolved Air Flotation (DAF) process is a chemical-physical treatment used to remove oils and fats, emulsions and suspended solids from the wastewater and, as consequance, also the COD, BOD and color loads are reduced. The principle is that air is initially dissolved in the water under a pressure of several atmospheres, followed by release of the pressure to the atmospheric level. The entire flow is held in a retention tank under pressure to allow time for the air to dissolve; then it is sent to the floatation tank where it comes out of solution forming very fine bubbles.