C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
361/36
C02F 1/24 (2006.01) A01K 63/04 (2006.01) C02F 3/06 (2006.01) C02F 3/20 (2006.01) C02F 3/22 (2006.01)
Patent
CA 2004817
Contaminated water is caused to flow up through a chamber (4) while aerated to produce all bubbles of a size mainly in the range of 0,03 mm to 1 mm by means of air diffusors (B) disposed at the bottom of the chamber. Organic and inorganic impurities in the water is, by a combination of water flow, flotation and physical adsorption caused by the air bubbles. brought to the surface of the water in the chamber (4) where a foam containing dissolved impurities is formed and instantly removed from the chamber while a mixture of water particles and microscopic air bubbles is allowed to flow over a partition wall (6) into an adjacent basin (2) having a considerably larger volume than that of the chamber (4). In the basin (2) a flotation process will take place causing a slurry (16) to form on the surface of the water in the basin which is removed preferably at the end of the basin opposite the chamber (4). The raising air bubbles from the diffusor (8) in the chamber (4) causes the water to circulate through the chamber (4) and basin (2), said chamber and basin communicating above and below the partition wall (6). Preferably a biofilter medium (12) having upwardly extending, intercrossing channels is disposed in the chamber (4).
Fetherstonhaugh & Co.
Sunfish Ltd. A.s.
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