Dissolved Air Flotation (DAFETP)

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Ecoagulation Technology

Gujarat, India

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Dissolved air flotation (DAF) is a process for removing suspended particles from a liquid by bringing particles to the surface of the liquid. The influent feed liquid can be raw water, wastewater, or liquid sludge. The flotation system consists of four major components: air supply, pressurizing pump, saturator (retention tank), and flotation chamber. According to Henry’s law, the solubility of a gas in an aqueous solution increases with increasing pressure.
Dissolved air flotation (DAF) has been successful in treating industrial wastewater. In many cases, such as in poultry effluent treatment, DAF proves to be an effective pretreatment technology by reducing the organic load of the wastewater. In both cases, DAF combined with chemical flocculation has proven to be very effective in removing particles from the effluents.
Thus, DAF should not be considered as a separate process, but integrated into the design and operation of the overall treatment system. Recent technological advances in DAF include DAFRapide, AquaDAF, and high-rate DAF. DAF is considered one of the most powerful tools to remove light and difficult-to-treat colloidal suspensions, precipitates, or fine dispersions.