Abstract: An aqueous stream is pumped through a vortex cylinder. The aqueous stream is rotated in a downwardly moving spiral stream within the vortex cylinder at a high downward velocity. The downward velocity of the aqueous stream increases as it flows through a discharge conduit concentrically located within a mixing chamber of the vortex cylinder. An adjustable inlet tube open to atmospheric pressure extends through the vortex chamber and into the discharge conduit. A negative pressure zone is created at the discharge end of the discharge conduit for drawing fluid into the aqueous stream for mixing therewith and dissolving oxygen in the aqueous solution.

Abstract: An aqueous scream is pumped through a vortex cylinder. The aqueous stream is rotated in a downwardly moving spiral stream within the vortex cylinder at a high downward velocity. The downward velocity of the aqueous stream increases as it flows through a discharge conduit concentrically located within a mixing chamber of the vortex cylinder. An adjustable air inlet tube open to atmospheric pressure extends through the vortex chamber and into the discharge conduit. A negative pressure zone is created at the discharge end of the discharge conduit for drawing air into the aqueous stream for mixing therewith and dissolving oxygen in the aqueous solution.

Abstract: An aqueous scream is pumped through a vortex cylinder. The aqueous stream is rotated in a downwardly moving spiral stream within the vortex cylinder at a high downward velocity. The downward velocity of the aqueous stream increases as it flows through a discharge conduit concentrically located within a mixing chamber of the vortex cylinder. An adjustable air inlet tube open to atmospheric pressure extends through the vortex chamber and into the discharge conduit. A negative pressure zone is created at the discharge end of the discharge conduit for drawing air into the aqueous stream for mixing therewith and dissolving oxygen in the aqueous solution.