Dissolved air flotation is a physical process whereby very fine air bubbles - microbubbles - attach themselves to particles in the water and float them to the surface where they form a floating sludge blanket which is easily removed. Fluent's flow modeling software was used to improve particle removal efficiencies and loading rates.

This simulation of a single dissolved air flotation unit includes a two-phase calculation, with air/water volume fraction contours shown in the cross-sectional plane
Courtesy of Thames Water