Dissolved Air Flotation (DAF) systems remove suspended solids, fats, oils,

Dissolved Air Flotation is a proven and effective physical/chemical technology
for treating a variety of wastewater streams
DAF systems are designed to remove total suspended solids (TSS), biochemical
oxygen demand (BOD), and oils and greases (O&G) from a wastewater stream.
Contaminants are removed using 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 the 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.

​Dissolved air flotation (DAF) is a proven and effective physical/chemical
technology for treating a variety of industrial and municipal process and
wastewater streams. DAF systems are commonly used for the removal of oils &
greases and suspended solids to meet a variety of treatment goals including:

Product recovery and reuse
Pretreatment to meet sewer discharge limits
Pretreatment to reduce loading on downstream biological treatment systems
Polishing of biological treatment effluent
Thickening of biosolids

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