Abstract: A turbine impeller pump particularly for use in a geothermal pumping system has a casing with a hollow cylindrical stator or axle fixedly connected in the longitudinal axis thereof which stator or axle defines a flow passage for motive fluid and enables a rotor assembly to be rotatably mounted thereon. The rotor has spaced composite impellers which lie in assembled position in medially disposed pumping chambers in the casing having a suction inlet for fluid to be pumped and a discharge outlet for pumped fluid. The rotor further has first and second multi-stage axial flow driving assemblies disposed on opposite sides of the spaced composite impellers so that the motive fluid for driving the same can be passed to the respective adjacent composite impellers and delivered with the fluid being pumped.

Abstract: A mixing vessel is provided for the treatment of wastes with aerobic bacterial cultures having high-turbulent mixing under conditions supportive of rapid waste digestion. The mixing vessel has a chamber therein with a sparger depending into the central portion and providing streams of incoming untreated waste feed that are distributed radially from the longitudinal axis of the vessel. Medially positioned in the chamber is an annular collector concentric to the sparger for withdrawing waste material under treatment into a recirculation loop. The collector is operatively associated with a recirculation pump, a system outlet, an aeration fluid delivery means and a jet injector. The jet injector has a nozzle for propelling at high velocities a jet of fluids upwardly into the chamber along the longitudinal axis. The jet is comprised of recirculation wastes and entrained air.