Dissolved Air Flotation

 

 

 

The EKOTON DAF Unit is used for cleaning wastewater from suspended solids including fats, oil products, and phosphates while reducing COD and BOD in wastewater. Industries and use include food (meat, dairy, fish, canning, etc.), textile and leather, oil and fat plants, iron and steel, and sludge thickening.

The initial wastewater is pumped to the mixer inlet, i.e. to the DAF unit, where the effluents are treated with reagents and then enter the mixing chamber with the simultaneous supply of a water-air mixture. Air and suspended solids float to the surface in the form of coagulated particles. Larger flotation complexes reach the surface at the mixing chamber stage. The rest goes with the wastewater to the flotation chamber. The resulting foam is removed from the surface of the water by the scraper mechanism and discharged into the collection tray. Heavy contaminants settle on the bottom of the unit and are removed.

 

The clarified wastewater is discharged from the installation. Part of the purified water is taken by the pump to saturate it with air. After this, the air-water mixture enters along with the mainstream into the mixing chamber of the flotator. The water level in the flotator is controlled by changing the overflow height.

Dissolved air flotation is one of the most efficient physicochemical methods of industrial wastewater treatment.

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Technical Information

Productivity: 2-280 m3/h

Recirculation coefficient: 20-200%

Recycle pressure: 5-6.5 bar

Flotation surface: 0.5-21.6 m2

Lamella block volume: 0.5-16 m3

Reduced lamella block flotation area: 5-94 m2