DISSOLVED AIR FLOTATION THICKENER


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<emphasis role="bold">DISSOLVED AIR FLOTATION THICKENER</emphasis>
<emphasis role="bold">DISSOLVED AIR FLOTATION THICKENER</emphasis>In a dissolved air flotation (DAF) thickener, solids and liquid are separated via the introduction of fine gas bubbles (typically air) to the liquid phase. The bubbles attach to solids particles, making them buoyant. They then rise to the liquid surface, where a skimmer collects them. This process typically is used to thicken WAS, aerobically digested solids, and contact-stabilized, modified activated, or extended-aeration solids without primary settling. It typically is not used for primary or trickling filter solids because gravity settling is more economical. However, it can effectively cothicken (settle and cons…
Citation
Water Environment Federation: Design of Municipal Wastewater Treatment Plants: WEF Manual of Practice No. 8 ASCE Manuals and Reports on Engineering Practice No. 76, Fifth Edition. DISSOLVED AIR FLOTATION THICKENER, Chapter (McGraw-Hill Professional, 2010), AccessEngineering Export