Dissolved Air Flotation (DAF) is a wastewater treatment process that involves removing suspended solids, oils, and other contaminants from water. The process involves dissolving air in water under pressure and then releasing it at atmospheric pressure in a flotation tank. The release of air creates tiny bubbles that attach to the contaminants, causing them to float to the surface of the tank where they can be skimmed off.
DAF systems are commonly used in industrial and municipal wastewater treatment applications, as well as in the treatment of stormwater runoff. They can be effective in removing contaminants such as grease, oil, and suspended solids, as well as some dissolved pollutants such as metals and chemicals.
DAF systems are typically designed as rectangular or circular tanks with a series of mechanical or hydraulic skimmers that remove the floating sludge. The treated water is then discharged into the environment or further processed for reuse.
DAF systems can be operated as standalone units or integrated into larger treatment plants. They can also be used in combination with other treatment processes such as activated sludge or membrane filtration to achieve higher levels of treatment.
Overall, DAF systems are a reliable and efficient way to treat wastewater and are commonly used in a variety of industrial and municipal applications.