Liquid purification or separation – Processes – Treatment by living organism
Reexamination Certificate
2011-08-09
2011-08-09
Barry, Chester T (Department: 1776)
Liquid purification or separation
Processes
Treatment by living organism
C210S607000, C210S620000, C210S621000, C210S622000, C210S623000, C210S624000, C210S625000, C210S626000
Reexamination Certificate
active
07993522
ABSTRACT:
Wastewaters are treated by an activated sludge process that includes combining wastewater with bacteria-laden sludge in an activated sludge tank to form a mixed liquor, separating the mixed liquor into a clear effluent and activated sludge stream, pretreating at least a portion of the activated sludge stream in a conditioning tank, transferring at least a portion of the activated sludge stream in the conditioning tank to an interchange bioreactor operating in batch or continuous flow mode, processing the activated sludge stream within the interchange bioreactor by selecting desired growth conditions to cultivate at least one type of bacteria in the activated sludge stream, and returning at least a portion of the activated sludge stream in the bioreactor to the activated sludge tank. The process may further include a sidestream reactor to remove phosphates from the activated sludge stream leaving the interchange bioreactor.
REFERENCES:
patent: 3047492 (1962-07-01), Gambrel
patent: 3756946 (1973-09-01), Levin et al.
patent: 4159944 (1979-07-01), Erickson et al.
patent: 4279753 (1981-07-01), Nielson et al.
patent: 4407717 (1983-10-01), Teletzke et al.
patent: 4790939 (1988-12-01), Suzuki et al.
patent: 4999111 (1991-03-01), Williamson
patent: 5013442 (1991-05-01), Davis et al.
patent: 5094752 (1992-03-01), Davis et al.
patent: 5128040 (1992-07-01), Molof et al.
patent: 5246585 (1993-09-01), Meiring
patent: 5288405 (1994-02-01), Lamb, III
patent: 5356537 (1994-10-01), Thurmond et al.
patent: 5733455 (1998-03-01), Molof et al.
patent: 5853588 (1998-12-01), Molof et al.
patent: 6015496 (2000-01-01), Khudenko
patent: 6113788 (2000-09-01), Molof et al.
patent: 6383387 (2002-05-01), Hasegawa et al.
patent: 6585895 (2003-07-01), Smith et al.
patent: 7163629 (2007-01-01), Abu-Orf et al.
patent: 7520980 (2009-04-01), Monosov et al.
Dong Hyun Chon, “Performance and Mechanisms of Excess Sludge Reduction in the Cannibal(TM) Process,” Mar. 30, 2005, M.S. Thesis, Virginia Polytechnic Univ., Blacksburg, VA.
Ruth Roxburgh, et al., “Sludge Minimization Technologies—Doing More to Get Less,” WEFTEC(R) 06, 2006, p. 506-525.
International Search Report dated Jul. 2, 2008 for Application No. PCT/US07/01815.
Curtis Betty-Ann
Kutcher Thomas
Roehl Marc E.
Barry Chester T
Siemens Industry Inc.
LandOfFree
Conditioning system for activated sludge wastewater... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Conditioning system for activated sludge wastewater..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Conditioning system for activated sludge wastewater... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2698632