Smart-Storm - Dissolved Aeration Flotation (DAF) Plants
FromSmart Storm Ltd.
DAF plants use chemicals, aeration and mechanical scrappers to remove dissolved and suspended solids and oils and grease from wastewater streams. They can be up to 90% efficient but are unsuitable for liquid only applications.
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The feed wastewater to the DAF float tank is often (but not always) dosed with a coagulant (such as ferric chloride or aluminium sulphate) to coagulate the colloidal particles and/or a flocculant to conglomerate the particles into bigger clusters.
The wastewater is then fed into a floatation tank where white water (pressurised aerated water) consisting of microbubbles attaches to the solids in the effluent stream which float to the surface which is then removed by a skimme