Dissolved Air Flotation (DAF) System

Dissolved Air Flotation (DAF) provides an extremely efficient method for the treatment of wastewaters that are high in contaminants.  It is used to reduce suspended solids (SS), fats, oil, grease (FOG), chemical oxygen demand (COD) and heavy metals.

Wastewater is pH balanced and mixed with a coagulant to achieve the maximum separation of liquids and solids.  The solids form larger clumps, and a continuous stream of microscopic air bubbles causes these clumps to float.  A rotating scraper at the top of the flotation tank skims the thickened waste to a chute for disposal and the cleaned wastewater is discharged over a weir.  Sludge which settles in the flotation tank is removed through a timer-operated valve.  The discharge may be fed directly to sewer or further treated by one of our biological treatment systems.

The DAF process is suited to a wide range of industrial applications and flow rates.


  • able to treat a wide range of wastewaters
  • compact footprint
  • low power consumption
  • few moving parts
  • easily maintained
  • waste discharge as a thickened sludge
  • complete freestanding integrated system – ready to install
To download our data sheet, please click:  

a DAF plant at a bakery


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