Daf Drinking Water Treatment

Dissolved air flotation daf is a water treatment process that clarifies wastewaters or other waters by the removal of suspended matter such as oil or solids.

Daf drinking water treatment.

Product recovery and reuse. Dissolved air flotation daf is a water treatment process for removing oils solids and greases from a water supply. The removal is achieved by dissolving air in the water or wastewater under pressure and then releasing the air at atmospheric pressure in a flotation tank basin. Kwi group is the global leader in delivering dissolved air flotation daf for water and wastewater treatment systems for industrial and municipal applications.

Daf systems are commonly used for the removal of oils greases and suspended solids to meet a variety of treatment goals including. The process was first used in scandinavia and south africa and over the last 25 years has seen increasing and widespread use around the world. The released air forms tiny bubbles which adhere to the suspended matter causing the suspended matter to float to the surface of the water where it may then be removed by a. The feasibility of dissolved air flotation daf for water treatment is frequently assessed by bench scale tests using commercially available 1 2 l volume daf jar test apparatus.

Daf can be effective in treating algae bloom or red tides when overproduction of algae discolors surface water and sometimes contaminates it with toxins. However it has been successfully applied in korea to treat the raw water containing algae blooms. With more than 4 700 installations in 77 countries kwi excels in industrial waste water treatment biological treatment process and potable water applications. In addition to its use in drinking water treatment daf also is used for pretreatment in seawater desalination systems including as an add on for fluence s nirobox sw.

The dissolved air flotation daf process mixes a clarified stream from the outlet of the unit with air at 3 9 bar to produce a supersaturated compared with saturation at atmospheric pressure solution of air in water. Daf dissolves air in pressurized water then releases it at atmospheric pressure. Since 2003 a full scale dissolved air flotation daf process has been operated by the korea water resources corporation k water in the songjeon drinking water treatment plant swtp. Daf process was not used in water treatment plants but wastewater treatment plants so there was not much experience of using daf for water treatment in korea.

The process helps clarify wastewaters by eliminating different types of suspended matter. Dissolved air flotation daf is a proven and effective physical chemical technology for treating a variety of industrial and municipal process and wastewater streams.