Patent ID: 6884353
Filing Date: 2005-04-26
Classification: B01F,C02F,Y02W

Abstract:
1. A method of aeration of wastewater in a wastewater septic tank without agitating the sludge in the septic tank, said method comprising: moving atmospheric pressure air downwardly through a confined elongated zone through use of a rotating impeller into a larger zone of reduced air pressure and through an air plate, a series of concentrically positioned rings of apertures, periodically interrupted by air slots, said impeller lying beneath said air plate, said air plate having air holes; whereby the dowawardlymoving air interfaces the wastewater in the area around the impeller to cause a high degree of shearing force in the area between the impeller and the air plate such that air is pushed through the air holes of said air plate into the wastewater in the septic tank in the form of extremely small, reduced pressure microbubbles capable of dispersing themselves throughout the wastewater in the septic tank by Brownian movements without agitating the majority of the wastewater; and maintaining the dispersed microbubbles in said wastewater to increase lateral oxygen transfer to replace dissolved oxygen used by aerobic bacteria.