Dissolved Air Flotation (DAF) System; is the process of separating pollutants in wastewater, especially oil, by floating them. Air bubbles are formed in the wastewater with the pressurized air given to the system. Pressurized air is obtained by air given to the pressure tank from the compressor. Flocs held on the surface of the air bubbles contain pollutants. Thus, the formed flocs rise to the surface of the wastewater. The high-pressure pump and specially designed diffuser unit are the main elements of the system. In addition, the air compressor, pressure tank, pressure reduction system and mechanical mixers are other equipment of the unit.
The dissolved air is recirculated back into the DAF system and the flocs are accumulated on the surface as a result of contact with the floc particles. The heavy particles settle to the bottom. While the foam and oil accumulated on the surface are removed from the system with the surface scraper; the excess sludge at the bottom is taken to the sludge dewatering unit. The surface scraper consists of a series of PE material scrapers with a motor reducer group and a driven chain gear system. The purified water is removed from the system by sluices.
The unit is manufactured with epoxy paint protection on St.37 sheet metal.
Areas of Use
- Surface coating processes are applied according to customer requests or waste characterization.
- The outlet sluice is adjustable.
- Bottom mud is taken out at certain time intervals with a screw conveyor.
- It works with less equipment and space requirements.
- Separated solids are denser than settled solids.
- It is the most suitable equipment for liquid – solid separation.
