SEWAGE-TREATING SYSTEM

• US 3,628,775 A
• Filed: 02/14/1969
• Issued: 12/21/1971
• Est. Priority Date: 02/14/1969
• Status: Expired due to Term

• Current Assignee: Christopher W. Mcconnell, Robert W. Slater
• Original Assignee: Christopher W. Mcconnell, Robert W. Slater
• Inventors: Mcconnell, Christopher W., Slater, Robert W.
• Application Number:
  US04/799,434
• Time in Patent Office: 1,040 Days
• US Class Current: 261/37
• CPC Class Codes: B01F 23/232311 the conduits being vertical draft pipes with a lower intake end and an upper exit end
• CPC Class Codes: B01F 35/32015 Flow driven
• CPC Class Codes: B01F 35/3203 Gas driven
• CPC Class Codes: B01F 35/71 Feed mechanisms with proportioning B01F35/80
• CPC Class Codes: B01F 35/712 for feeding fluids
• CPC Class Codes: B01F 35/71805 using valves, gates, orifices or openings
• CPC Class Codes: C02F 3/223 using "air-lift"
• CPC Class Codes: Y02W 10/10 Biological treatment of water, waste water, or sewage

Abstract

A sewage digestion system includes a liquid-submerged vertical stack with top discharge and bottom inlet openings and an upper selection of larger cross section than the lower section and provided with peripherally spaced inlet ports. A generator for bubbles preferably of approximately the cross section of the stack lower section registers with the inlet opening. A torus pipe connected to a low-pressure blower surrounds the stack above the inlet ports and an annular wall surrounds the pipe and extends to the stack below the ports, the pipe being between 1 foot and 3 feet below the liquid level. In the alternative the torus is at about the level of the stack discharge opening and the inlet ports are omitted.

Claims

1. A system for treating sewage in a liquid body at a predetermined level comprising a vertically extending stack positioned in said pool and having a lower inlet opening and an upper discharge opening below said predetermined level, first means for cyclically generating and feeding successive relatively larger bubbles into the lower part of said stack of transverse cross section at least half that of said stack to effect the upward circulation of liquid in said stack and through said discharge opening to effect the flow of liquid in the proximity of said discharge opening, a pipe extending peripherally about said discharge opening at a level between 1 and 3 feet below said liquid body level and having outlet orifices in and spaced along the length of the underface of said pipe, and a low-pressure air blower having an outlet connected to said pipe.

2. The system of claim 1 wherein said pipe is a torus positioned no higher than the level of said discharge opening.

3. The system of claim 1 wherein said stack includes upper and lower sections, said upper section having a transverse cross-sectional area greater than that of said lower section.

4. The system of claim 3 wherein said stack upper section has an inlet port formed therein below said discharge opening and providing communication between said stack and the surrounding liquid body.

5. A liquid-treating apparatus comprising a vertically extending stack having a lower inlet opening and an upper discharge opening and including a lower section and an upper section of greater transverse cross-sectional area than that of said lower section, Means for cyclically producing and releasing relatively high-pressure bubbles into said stack lower section of a transverse cross-sectional area at least one-half that of said lower section, a pipe having outlet orifices formed therein located proximate said discharge opening, a relatively low-pressure blower having an outlet connected to said pipe and wherein said stack upper section has inlet ports formed therein below said discharge opening.

6. The apparatus of claim 5, including a frustoconical base-defining wall having inlet openings along its lower border, said stack being coaxially mounted on said base and communicating with the interior thereof.

7. A liquid-treating apparatus comprising a vertically extending stack having a lower inlet opening and an upper discharge opening and including a lower inlet opening and an upper discharge opening and including a lower section and an upper section of greater transverse cross-sectional area than that of said lower section and having inlet ports formed therein below said discharge opening, means for cyclically producing and releasing bubbles into said stack lower section of a transverse cross-sectional area at least one-half that of said lower section, a pipe having outlet orifices formed therein located proximate said discharge opening, a blower having an outlet connected to said pipe, and an annular wall radially spaced from and extending about said stack upper section and extending above said inlet port and having a lower portion extending to said stack below said inlet ports, said pipe being of torus shape and positioned between said cylindrical wall and said stack above said inlet ports.

8. The apparatus of claim 7 including a baffle projecting outwardly from the upper periphery of said stack upper section and positioned above the upper edge of said annular wall.

9. A system for treating sewage in a liquid body at a predetermined level comprising a vertically extending stack positioned in said pool and having a lower inlet opening and an upper discharge opening below said predetermined level and including a lower section and an upper section of greater transverse cross-sectional area than that of said lower section, said stack upper section having inlet ports formed therein around the periphery thereof below said discharge opening, a cylindrical wall surrounding and outwardly spaced from said stack upper section and extending along said inlet ports, first means for cyclically generating and feeding successive relatively larger bubbles into the lower part of said stack of transverse cross section at least half that of said stack to effect the upward circulation of liquid in said stack and through said discharge opening to effect the flow of liquid in the proximity of said discharge opening, a torus-shaped pipe positioned between said stack upper section and said cylindrical wall and having discharge orifices formed therein and a blower having an outlet connected to said pipe.

10. The system of claim 9, including a horizontal baffle projecting outwardly from the upper periphery of said stack upper section and positioned above the upper edge of said cylindrical wall.