Propeller aerator with peripheral injection of fluid and method of using the aerator

A propeller type aeration apparatus for inducing the flow of fluids into a liquid being treated by the rotation of a propeller in the liquid comprising:

• an outer housing having a hollow interior, opposite first and second ends, and a longitudinal dimension extending between the two ends;
• a drive shaft supported for rotary motion about its axis within the hollow interior of said outer housing;
• motor means connected to a first end of said drive shaft for rotating said drive shaft;
• a propeller attached to a second end of said drive shaft whereby the rotation of said drive shaft rotates said propeller and induces a flow of the liquid in which the propeller is disposed;
• a first fluid outlet extending through the center of said propeller;
• and
• at least one elongate conduit attached to an outer surface of said outer housing, one end of said conduit having a second fluid outlet located adjacent to and downstream of the periphery of said propeller and in the path of the flow of the liquid caused by the propeller, and a second end of the conduit being in communication with a fluid to be injected into the fluid.