Abstract: A liquid feed line includes a stepped internal nozzle and an exit diameter smaller than the diameter of the liquid feed line. The stepped internal nozzle desirably introduces hydrodynamics or hydraulic waves for the fluid, with the number of steps selected based on the pressure of the motive flow. By limiting the length of the stepped internal nozzle cylinder, a desirable splayed liquid stream is formed within a mixing chamber in fluid communication with a vent line. An exit cylinder in fluid communication with the mixing chamber includes a channel through which an aerated liquid stream of fluid passes. The entrance and exit faces forming the channel are substantially perpendicular to the fluid flow with the channel having a generally uniform dimension, neither converging nor diverging, and a diameter 1 to 10 times greater, depending on the pressure of the motive flow, than the exit to the internal nozzle.

Abstract: Air is mixed with water passing through a liquid feed line. An internal nozzle carried within the feed line includes an exit diameter smaller than the diameter of the feed line for creating a liquid stream for mixing with air from a vent line directed into a mixing chamber within the feed line. Through the force of the nozzle, the aerated water is focused into an exit channel having a flat entrance face and an exit bore diameter greater than that of the internal nozzle.

Abstract: An apparatus and method for introducing a gas into a liquid comprising a liquid feed line in fluid communication with a liquid supply, wherein said liquid supply provides a pressurized liquid flow there through; an internal nozzle, attached to said liquid feed wherein said internal nozzle has an exit diameter smaller than the diameter of said liquid feed thereby creating a liquid stream when liquid passes there through; a mixing chamber in fluid communication with a vent line and said internal nozzle; an exit cylinder in fluid communication with said mixing chamber, having a channel through which a liquid stream passes, said channel having a diameter greater than the exit to said internal nozzle.