Wastewater treatment system

Details Wastewater treatment system Wastewater treatment system

2011-08-16

2011-08-16

Barry, Chester (Department: 1778)

Liquid purification or separation

With gas-liquid surface contact means

C210S151000, C210S220000

Reexamination Certificate

active

07998343

ABSTRACT:
Wastewater treatment systems are disclosed with improved aeration tanks. The aeration tank includes an inverted frusto-conical clarifier and a submersible aerator pump disposed between the bottom of the aeration tank and the interior of the clarifier. The pump is connected to an air inlet line that can pass downward through the clarifier. A plurality of bubble outlet lines extend outward from the pump radially and tangentially towards the sidewall of the aeration tank. Bubbles rise upward through the aeration space disposed outside of the clarifier and around the aeration space or around the clarifier for improved mixing. The system may include a baffled pretreatment tank and/or pump tank The slopes of the sidewalls of these tanks are of the same magnitude but opposite to that of the aeration tank thereby enabling tank nesting. Methods of retrofitting water treatment systems and treating wastewater are disclosed.

REFERENCES:
patent: 3807565 (1974-04-01), Langston et al.
patent: 4051204 (1977-09-01), Muller et al.
patent: 4054524 (1977-10-01), Mackrle et al.
patent: 4259182 (1981-03-01), Belveal
patent: 5162083 (1992-11-01), Forbes et al.
patent: 6569338 (2003-05-01), Ozyboyd

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