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1. (WO1999008780) IMPROVED MIXING AND AERATING APPARATUS

Pub. No.:    WO/1999/008780    International Application No.:    PCT/AU1998/000653
Publication Date: Fri Feb 26 00:59:59 CET 1999 International Filing Date: Thu Aug 20 01:59:59 CEST 1998
IPC: B01F 3/04
B01F 7/00
B01F 7/26
Applicants: LEWIS, Michael, Anthony
TVA TECHNOLOGIES PTY LTD
Inventors: LEWIS, Michael, Anthony
Title: IMPROVED MIXING AND AERATING APPARATUS
Abstract:
A mixing apparatus comprising a central disc driven by a rotating shaft. A number of mixing plates are stacked above and/or below the central disc. The mixing plates are spaced from and parallel to the central disc. Each plate has a central aperture and the diameter of the central aperture increases progressively away from the central disc to define a space coaxial with the rotating shaft. In operation, fluid is drawn into the space and directed out through the space between the plates. When placed near the surface of a fluid, air is drawn in and the fluid is aerated as well as mixed.