Liquid purification or separation – Processes – Treatment by living organism
Reexamination Certificate
2006-02-28
2006-02-28
Barry, Chester T. (Department: 1724)
Liquid purification or separation
Processes
Treatment by living organism
C210S220000, C210S196000, C210S197000, C210S150000, C210S620000
Reexamination Certificate
active
07005069
ABSTRACT:
A wastewater treatment plant includes (i) an aeration vessel having a bottom portion, a top portion and a side portion disposed therebetween to hold a quantity of wastewater, the top portion and the bottom portion being disposed at least 20 feet apart from one and the other to define a depth, the depth being capable of being substantially filled with wastewater; (ii) a coarse bubble diffuser disposed proximal to the bottom portion, the diffuser having a plurality of orifices orientated horizontally toward the side portion; the orifices having a diameter of at least 0.125 inches; and (iii) a source of enriched oxygen gas in fluid communication with the diffuser; wherein the enriched oxygen gas exiting the orifices prevents settling of solid components of the wastewater without the use of a mechanical mixer. Further, the depth of the aeration vessel may be at least about 20 feet or deeper, for instance at least about 30 feet or deeper. A method for treating wastewater includes the steps of (i) providing a first deep and enclosed aeration vessel; the vessel having a depth of at least about 20 feet; (ii) providing wastewater having dissolved solids to substantially fill the vessel; and (iii) providing enriched oxygen gas at the bottom of the vessel through a coarse bubble diffuser at a sufficient flow to prevent settling of the solids without then need for a mechanical mixer.
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http://www.tideflex.com/product—pages/check—valves/all—rubber/main.htm, downloaded Jun. 17, 2005.
Barry Chester T.
Hoffmann & Baron , LLP
Passaic Valley Sewerage Commissioners
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