Patent ID: 7566397

Claim:
A wastewater treatment system, comprising: a raw sewage source for flow of sewage therethrough, the raw sewage source having an inlet and an outlet; a raw sewage inlet for receipt and flow of sewage therethrough, the sewage inlet having a first end and a second end, the first end of the raw sewage inlet in fluid communication with the raw sewage source; a sewage outlet for flow and discharge of oxygenated sewage therethrough, the sewage outlet having a first end and a second end, the second end of the sewage outlet in fluid communication with the raw sewage source; a source of high purity oxygen operably connected to the raw sewage inlet between the first and second ends of the raw sewage inlet to permit oxygen gas from the source to be introduced to the raw sewage inlet; and an oxygenator, the oxygenator comprising a container comprising an inverse conically shaped portion having a first end and a second end, a cylindrical portion having a first end attached to the second end of the inverse conically shaped portion and a second closed end, an inlet at the first end of the inverse conically shaped portion, and an outlet extending perpendicularly from the cylindrical portion and spaced apart from the second closed end, the oxygenator inlet, the inverse conically shared portion, and the cylindrical portion coaxially surrounding a vertical axis and the oxygenator outlet extending perpendicular to the vertical axis, the oxygenator inlet and the oxygenator outlet having a first diameter, the first end of the inverse conically shaped portion having said first diameter, the second end of the inverse conically shaped portion and the cylindrical portion having a second diameter, and the inlet of the oxygenator operably connected to the second end of the raw sewage inlet and the outlet of the oxygenator operably connected to the first end of the sewage outlet, such that the combination of sewage and oxygen gas collected in the raw sewage inlet is introduced to the oxygenator through the oxygenator inlet, flows through the oxygenator to the oxygenator outlet and through the sewage outlet, thereby discharging oxygenated sewage containing dissolved oxygen from the oxygenator; wherein the first diameter of the oxygenator inlet and the oxygenator outlet and the first end of the inverse conically shaped portion of the oxygenator is smaller than the second diameter of the second end of the inverse conically shaped portion and the cylindrical portion of the oxygenator.