PIERO M. ARMENANTENJITFlotation•Flotation is a separation process based on theuse of very fine gas bubbles that attachthemselves to the solid particles in suspensionto make them buoyant and drive them towardthe free surface of the liquid•Air is the only flotation agent used inwastewater treatment•Flotation is especially useful to separate verysmall particles or light particles with lowsettling velocities. In such cases morecomplete and rapid separation can be obtainedwith flotation than with sedimentation
PIERO M. ARMENANTENJITChemical Additives to EnhanceFlotation Processes•Chemical additives that promote theattachment or entrapment of air bubbles tosolid particles or flocs can be effectively usedto enhance flotation•Flotation additives include:-aluminum and ferric salts-activated silica-organic polymers
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