Dissolved Air Flotation (DAF)

The  Dissolved Air Flotation (DAF) clarifier is a very effective tool in removing suspended solids, fats, oils, metals, and non-soluble BOD from a waste stream.

In a DAF clarifier, microscopic air bubbles are produced and mixed with the incoming wastewater. The air bubbles attach themselves to the contaminants, which gives them buoyancy. The buoyant mixture of particles and air bubbles floats to the surface and is removed by a skimming mechanism.

Air bubble production is achieved by pressurizing a portion of the clean effluent and recycling it back to the influent to be mixed with the waste stream. As the super-saturated water enters the DAF the pressure is removed and millions of microscopic air bubbles are produced. The bubbles become entrained in the solids, rise to the surface, and form a bed of material that is skimmed into an isolated chamber.

The effluent quality of a DAF is greatly improved with chemical pre-treatment. Our Snake-Blend™ and CAT systems offer the latest in design technologies. Removal rates for FOG and TSS are typically 95% to 97% with proper chemical pretreatment.


Our DAF treatment systems can be used across a wide range of industries for a variety of applications, including:

  • Algae Removal
  • Aircraft Maintenance
  • Automotive
  • Ballast Water Treatment
  • Biodiesel Process Water
  • Canning Plants
  • Chemical Processing Plants
  • Dairy Products
  • Durable Goods
  • Fiber Recovery
  • Fiber Recovery
  • Food Processing
  • Frozen Food Processing
  • Heavy Metals Removal
  • Hydro-Frac Flow Back Water
  • Meat Packing
  • Military Wash Racks
  • Mining
  • Oil Refinery Waste
  • Paint Manufacturing
  • Pet Foods
  • Petro-Chemical
  • Poultry Processing
  • Power Plants
  • Prepared Water
  • Pulp and Paper
  • Railroads
  • Refinery
  • Storm Water Treatment
  • Vehicle and Fleet Cleaning


In addition to the standard features, our DAF clarifiers can also be equipped with:

  • Chemical Pre-Treatment
  • Expanded Float Chamber
  • Feed and Effluent Pump Systems
  • Sludge/Float Pump Systems
  • Nema 7 Control Panel
  • Sludge Auger
  • Expanded Effluent Chamber
  • Walkway
daf systems