Surface waters that contain algae can be challenging to treat in conventional settling and filtration processes. Being light and buoyant, algae and certain other organic materials found in lakes and reservoirs can resist settling and inhibit downstream filtration.
For removing such substances, Infilco Degremont (SUEZ ENVIRONNEMENT) offers the AquaDAF high-rate clarifier, a dissolved air flotation (DAF) process. Essentially a sedimentation process in reverse, it uses tiny air bubbles to float less-dense, flocculated impurities to the surface, where they are skimmed off.
The technology originated in Finland in the 1960s; Infilco Degremont licensed it and brought it to North America in 2000. It
