Dissolved Air Flotation (DAF) Systems

Source: Evoqua Water Technologies (now part of Xylem)

Dissolved Air Flotation (DAF) systems are designed to remove suspended solids (TSS), biochemical oxygen demand (BOD5), and oils and greases (O&G) from a wastewater stream. Contaminants are removed through the use of a dissolved air-in-water solution produced by injecting air under pressure into a recycle stream of clarified DAF effluent. This recycle stream is then combined and mixed with incoming wastewater in an internal contact chamber where the dissolved air comes out of solution in the form of micron-sized bubbles that attach to the contaminants. The bubbles and contaminants rise to the surface and form a floating bed of material that is removed by a surface skimmer into an internal hopper for further handling.

Key Features

  • Fourteen (14) different units to meet a variety of applications and flow ranges (10 to 2,500 gpm)
  • Available in 304 or 316 stainless steel construction
  • Complete, skid-mounted design for ease of installation (no field assembly required)
  • Rectangular profile for maximum space utilization
  • Rugged tank design that will not flex
  • Superior performance without the use of plate-pack that can foul or collapse
  • An industry-leading HELLBENDER® whitewater system which is both efficient and simple to use
  • Large, internal float hopper removes the need for an external float tank

Click here to learn more about Wastewater DAF systems or connect with a product specialist