An improved method and apparatus for aeration of septic tanks and the like. Because
of the interrelationship of the rotating impeller, an air plate and the horsepower
of the unit in comparison with the volumetric size of the sludge tank, the unit
disperses extremely small reduced pressure microbubbles adjacent the area of the
impeller. These reduced pressure microbubbles are thereafter dispersed throughout
the wastewater by Brownian movement without agitating the sludge. As a result,
there is substantially increased lateral oxygen transfer to replace the oxygen
used by the aerobic bacteria. The sludge is therefore efficiently digested without
the need for huge, expensive and energy inefficient equipment.
