Liquid purification or separation – Processes – Treatment by living organism
Reexamination Certificate
2005-09-20
2005-09-20
Prince, Fred G. (Department: 1724)
Liquid purification or separation
Processes
Treatment by living organism
C210S623000, C210S631000, C210S906000, C210S195200, C210S198100, C210S259000
Reexamination Certificate
active
06946073
ABSTRACT:
Removal of biological nutrients from a wastewater yielding a low phosphorous (e.g., less than 0.25 mg/L) output includes providing a serial multistage bioreactor containing activated sludge having in hydraulic series an anaerobic zone and a downstream aerobic zone, with each zone having an upstream inlet and a downstream outlet. The wastewater is provided to the anaerobic zone inlet. A quantity of chemical sufficient to precipitate soluble and particulate phosphorous is added to the downstream aerobic zone in an amount sufficient to yield a low phosphorous output. Treated water is separated from the activated sludge and precipitated phosphorous and a return activated sludge separated from the treated water is recycled to the anaerobic zone.
REFERENCES:
patent: 4008161 (1977-02-01), Wong
patent: 4237002 (1980-12-01), Strudgeon
patent: 4315821 (1982-02-01), Climenhage
patent: 4623464 (1986-11-01), Ying
patent: 4787978 (1988-11-01), Nicol
patent: 4867883 (1989-09-01), Daigger et al.
patent: 4882058 (1989-11-01), Burton
patent: 4904387 (1990-02-01), Jordan
patent: 4961854 (1990-10-01), Wittmann
patent: 5240611 (1993-08-01), Burton
patent: 5258121 (1993-11-01), Jordan
patent: 5290451 (1994-03-01), Koster et al.
patent: 5342522 (1994-08-01), Marsman
patent: 5354471 (1994-10-01), Timpany
patent: 5364534 (1994-11-01), Anselme et al.
patent: 5443845 (1995-08-01), Felix
patent: 5480548 (1996-01-01), Daigger
patent: 5514278 (1996-05-01), Khudenko
patent: 5601719 (1997-02-01), Hawkins
patent: 5603833 (1997-02-01), Miller
patent: 5643453 (1997-07-01), Pannier et al.
patent: 5650069 (1997-07-01), Hong
patent: 5651889 (1997-07-01), Wataya
patent: 5651891 (1997-07-01), Molof
patent: 5651892 (1997-07-01), Pollock
patent: 5725885 (1998-03-01), Felix
patent: 5733455 (1998-03-01), Molof
patent: 5783083 (1998-07-01), Henshaw et al.
patent: 5792355 (1998-08-01), Desjardins
patent: 5798044 (1998-08-01), Strohmeier
patent: 5853588 (1998-12-01), Molof
patent: 5942108 (1999-08-01), Yang
patent: 6007712 (1999-12-01), Tanaka et al.
patent: 6027649 (2000-02-01), Benedek
patent: 6077430 (2000-06-01), Chudoba et al.
patent: 6406628 (2002-06-01), Chang
patent: 6406629 (2002-06-01), Husain
patent: 6485645 (2002-11-01), Husain
patent: 6517723 (2003-02-01), Daigger
patent: 6551815 (2003-04-01), Nuttall
patent: 2002/0162795 (2002-11-01), Pollock
patent: 2003/0217968 (2003-11-01), Goel et al.
patent: 2314383 (2002-01-01), None
patent: 60-38095 (1985-02-01), None
patent: 4-215892 (1992-08-01), None
patent: 11-262795 (1999-09-01), None
patent: 2000-167555 (2000-06-01), None
Paper presented at AWWA Annual Conference & Exhibition, Dallas, Texas, Jun. 21-25, 1998, Lebeau et al., “Application of Immersed Membrane Microfiltration for NOM Removal”.
English translation of JP 04215892, “Sewage purifying Tank”, Aug. 1992.
Daigger Glen T.
Fleischer Edwin J.
Wollmann Albert M.
CH2M Hill Inc.
Prince Fred G.
Swanson & Bratschun LLC
LandOfFree
Method for treating wastewater in a membrane bioreactor to... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for treating wastewater in a membrane bioreactor to..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for treating wastewater in a membrane bioreactor to... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3394083