Liquid purification or separation – Processes – Treatment by living organism
Reexamination Certificate
2005-12-14
2008-07-22
Prince, Fred (Department: 1797)
Liquid purification or separation
Processes
Treatment by living organism
C210S605000, C210S607000, C210S612000, C210S622000, C210S623000
Reexamination Certificate
active
07402247
ABSTRACT:
The specification discloses a method for treating and digesting organic wastes in a wastewater stream. A first wastewater influent stream is mixed with an activated sludge biomass in an aerobic digestion zone, so that least a portion of the organic wastes in the first wastewater influent stream are digested by activated sludge biomass. The first wastewater influent stream is separated from the activated sludge biomass in a first separation zone to recover activated sludge biomass and to provide a wastewater effluent stream. The second wastewater influent stream is mixed with recovered activated sludge biomass from the aerobic digestion zone in a substantially anaerobic adsorption zone so that at least a portion of the organic wastes in the second wastewater influent stream are adsorbed by the activated sludge biomass. The second wastewater influent stream and the activated sludge biomass are then separated in a second separation zone to recover the activated sludge biomass and organic wastes adsorbed thereto from the anaerobic adsorption zone and to provide a substantially liquid wastewater stream which is recycled to the aerobic digestion zone. Finally, at least a portion of the activated sludge biomass and adsorbed organic wastes from the anaerobic adsorption zone are digested under substantially anaerobic conditions so as to recover a combustible gas stream. An apparatus for carrying out the method is also disclosed.
REFERENCES:
patent: 2196840 (1940-04-01), Singleton
patent: 2359004 (1944-09-01), Schlenz et al.
patent: 2786025 (1957-03-01), Lamb et al.
patent: 3440166 (1969-04-01), Davis et al.
patent: 3980556 (1976-09-01), Besik
patent: 4246099 (1981-01-01), Gould et al.
patent: 4568462 (1986-02-01), Bohnke et al.
patent: 4626354 (1986-12-01), Hoffman et al.
patent: 4681685 (1987-07-01), Sutton et al.
patent: 5228996 (1993-07-01), Lansdell
patent: 5393427 (1995-02-01), Barnard
patent: 5514277 (1996-05-01), Khudenko
patent: 5514278 (1996-05-01), Khudenko
patent: 6163932 (2000-12-01), Rosen
patent: 6444124 (2002-09-01), Onyeche et al.
patent: 6444125 (2002-09-01), Han
patent: 6673243 (2004-01-01), Srinivasan
patent: 6723242 (2004-04-01), Ohkata et al.
patent: 2002/0192809 (2002-12-01), Lanting et al.
patent: 2004/0094475 (2004-05-01), Hough
patent: 4036548 (1992-05-01), None
patent: 57-136996 (1982-08-01), None
patent: 1-135596 (1989-05-01), None
patent: WO 2004/046049 (2004-06-01), None
Thomas E. Schultz, Biological Wastewater Treatment, Chemical Engineering, Oct. 2005, pp. 44-50.
Luedeka Neely & Graham P.C.
Prince Fred
Shaw Intellectual Property Holdings, Inc.
LandOfFree
System for wastewater treatment and digestion having aerobic... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System for wastewater treatment and digestion having aerobic..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for wastewater treatment and digestion having aerobic... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3964372