Abstract:
A surface aerator in a tank creates horizontally directed surface flow that forms waves as the flow progresses through the tank and impinges upon the tank wall. At least one substantially horizontal baffle is mounted adjacent the inner wall of the tank adjacent or subjacent the liquid level and is positioned at a point of high wave amplitude to attenuate the waves by eliminating the vertical energy component thereof. The baffle may have a passage therethrough for circulation of liquid.
Abstract:
Apparatus for introducing a gas into a liquid by rotating about a vertical shaft a set of long, narrow blades, which extend downwardly and outwardly into the liquid in a radial direction, and which blades are inclined relative to a vertical radial plane passing through the blades. Air is drawn into the liquid on the rear side of the blades and liquid is caused to flow upwardly across the blades.