This is not dissolved air flotation (DAF). This is a mechanism of forced aeration flotation, but did not dissolved air flotation.

DAF feature (property): air bubbles form on all microparticles (hydrophobic and hydrophilic). Bubbles do not meet with particles.

Yanping LIU (National Institute of Applied Sciences of Toulouse, France) wrote tesis doctoral "ELIMINATION DE NANOPARTICULES D'EFFLUENTS LIQUIDES". More