Dissolved Air Flotation Units

The EUDAF is a single monoblock unit with all parts mounted on a single skit. Wastewater is delivered to the unit by pumping or gravity flow.

Influent stream is mixed with a side stream that is recirculated from the final effluent chamber. Side stream is saturated with air and the mixture is introduced into the contact chamber of the DAF unit. Heavy particles settle into the first section of conical bottom of the unit while the suspended matter is carried by micro air bubbles on the liquid surface.

Accumulated scum is then removed and conveyed to the sludge collection chamber by the action of a chain and flight mechanism. The liquid portion of the influent flows downwards through a lamella settler where remaining particles are separated and settle into the second section of the conical bottom of the unit. Settled particles are removed from two individual discharge ports installed at the lower bottom of the unit. Purified effluent flows through pipe(s) to the effluent chamber. Water level in the unit is adjusted with the use of overflow telescopic nozzles installed into the effluent chamber. A special multistage – multiphase pump is used to recirculate effluent to the inlet.

Compressed or atmospheric air is delivered to the recirculation pump and saturation of the air-water mixture is performed into the pressure vessel. Final purified effluent overflows through the discharge pipe.  



 WITH with
 EU-DAF05 5.0   1900 1090  1800  1450 450 
EU-DAF10  10.0  2580  1090  1800  2000  600 
EU-DAF15  15.0  2580  1090  1800  2300  700 
EU-DAF20  20.0  2860  1340  2140  2238  900 
EU-DAF25  25.0  2860  1340  2140  2238  900 
EU-DAF30  30.0  2800  1590  2390  2375 1000 
EU-DAF40  40.0  3200  1590  2390  2375  1100 
EU-DAF50  50.0  3380  1590  2390  2450  1250 

*The capacity may vary in relation to wastewater characteristics and solids content