Dissolved Air Flotation Systems (DAF) are indeed used in water treatment processes to remove suspended solids, oil, grease, and other contaminants from industrial wastewater. The process involves introducing air bubbles into the wastewater, which attach to the suspended particles and cause them to float to the surface, where they can be skimmed off and removed. This technology is widely used in various industries such as food processing, mining, oil and gas, and municipal wastewater treatment, among others, to achieve effective and efficient water purification.