Liquid purification or separation – Processes – Treatment by living organism
Reexamination Certificate
2007-10-23
2007-10-23
Prince, Fred G. (Department: 1724)
Liquid purification or separation
Processes
Treatment by living organism
C210S623000, C210S906000, C435S262500
Reexamination Certificate
active
11784408
ABSTRACT:
A wastewater treatment process wherein a portion of a mixture of influent waste water and biomass are transferred from a first anaerobic region to a second anaerobic region having a relatively long retention time in order to produce additional very short chain fatty acids therein which are thereafter returned to the first anaerobic region so that biomass therein takes up the very short chain fatty acids. The contents of the first anaerobic region thereafter flow downstream into an aerobic region wherein the biomass takes up phosphorus. A portion of the biomass is returned to the first anaerobic region and a second portion of the biomass is wasted with phosphorus therein, thereby removing phosphorus from the wastewater being treated.
REFERENCES:
patent: 3236766 (1966-02-01), Levin
patent: 3385785 (1968-05-01), Forrest et al.
patent: 3939068 (1976-02-01), Wendt et al.
patent: 3964998 (1976-06-01), Barnard
patent: 4183808 (1980-01-01), Drnevich
patent: 4415454 (1983-11-01), Fuchs
patent: 4431543 (1984-02-01), Matsuo et al.
patent: 4488967 (1984-12-01), Block et al.
patent: 4500429 (1985-02-01), Reimann et al.
patent: 4503154 (1985-03-01), Paton
patent: 4507207 (1985-03-01), Verhoeve et al.
patent: 4696746 (1987-09-01), Ghosh et al.
patent: 4917805 (1990-04-01), Reid
patent: 5228996 (1993-07-01), Lansdell
patent: 5242592 (1993-09-01), Ballnus
patent: 5246585 (1993-09-01), Meiring
patent: 5266200 (1993-11-01), Reid
patent: 5288405 (1994-02-01), Lamb, III
patent: 5393427 (1995-02-01), Barnard
patent: 5397474 (1995-03-01), Henry
patent: 5601719 (1997-02-01), Hawkins et al.
patent: 5733456 (1998-03-01), Okey et al.
patent: 5942108 (1999-08-01), Yang
patent: 6030528 (2000-02-01), Han
patent: 6139743 (2000-10-01), Park et al.
patent: 6217766 (2001-04-01), Stetter et al.
patent: 6312599 (2001-11-01), Reid
patent: 6338800 (2002-01-01), Kulperger et al.
patent: 6344143 (2002-02-01), Ahn et al.
patent: 6531058 (2003-03-01), Josse et al.
patent: 6706185 (2004-03-01), Goel et al.
patent: 7011757 (2006-03-01), Reid
patent: 2001/0045390 (2001-11-01), Kim et al.
patent: 2002/0158009 (2002-10-01), Khudenko
patent: 2003/0217968 (2003-11-01), Goel et al.
patent: 2005/0016920 (2005-01-01), Johnson
patent: 3-278896 (1991-12-01), None
patent: 3-296498 (1991-12-01), None
patent: 10-249387 (1998-09-01), None
South Cary Water Reclamation Facility's Nutrient Removal Modifications and Reduction Success, Town of Cary, North Carolina, Publication Date: 2001.
Evaluation of Several Water Reclamation Facilities Employing Biological Nutrient Removal in North Carolina, Publication Date: Nov. 2001.
New BPR Process Achieves High Phosphorous Removal Levels, Publication Date: Oct. 1994.
Conference on New Directions and Research in Waste Water and Residuals Management the Role of Full Scale Research in Biological Phosphate Removal, James L. Barnard, Date Unknown.
Fermentation of Return Activated Sludge to Enhance Biological Phosphorus Removal, Publication Date: 2002.
Exhibit 1—Various Treatment Facilities, Dates Unknown.
Black & Veatch Corp.
McMahon John C.
Prince Fred G.
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