What technology is commonly used to remove fats, oils, and greases in wastewater treatment?

The use of dissolved air flotation (DAF) is a highly effective technology for the removal of fats, oils, and greases (FOG) in wastewater treatment processes. DAF operates by injecting air into the wastewater, which creates tiny bubbles that attach to the contaminants, including fats and oils, causing them to rise to the surface as a froth. This froth is then skimmed off, allowing for the effective separation of these substances from the water.

DAF is particularly advantageous in treating industrial wastewater, such as that produced by food processing or oil and grease recovery, where high concentrations of FOG are common. The efficiency of DAF in removing these substances is superior to methods such as aerated lagoons or filtration, which may not be specifically designed to target and remove FOG effectively. Thus, DAF is a specialized and widely used method for addressing challenges associated with the presence of fats, oils, and greases in wastewater.