Liquid purification or separation – Processes – Treatment by living organism
Reexamination Certificate
2002-09-18
2008-11-18
Prince, Fred (Department: 1797)
Liquid purification or separation
Processes
Treatment by living organism
C210S613000, C435S262500
Reexamination Certificate
active
07452465
ABSTRACT:
A method of treating sewage sludge comprises a pathogen reduction stage in which raw sludge is incubated for a predetermined incubation period at a temperature in the mesophilic temperature range. The sludge is incubated in a plurality of sequential vessels (1a,1b,1c) comprising an upstream vessel (1a) which receives the raw sludge to be incubated and a downstream vessel (1c) which discharges the incubated sludge. The sludge is fed from the upstream vessel (1a) to the downstream vessel (1c), via any intermediate vessels (1b), and subsequently discharged after spending a predetermined residence time in each vessel, the total residence time being said predetermined incubation period.
REFERENCES:
patent: 2198737 (1940-04-01), Petersen
patent: 2315577 (1943-04-01), Bach
patent: 4022665 (1977-05-01), Ghosh et al.
patent: 4214985 (1980-07-01), Bodenrader
patent: 4372856 (1983-02-01), Morrison
patent: 4429043 (1984-01-01), Paton
patent: 4503154 (1985-03-01), Paton
patent: 4983298 (1991-01-01), Fuchs et al.
patent: 5725770 (1998-03-01), Henry
patent: 6077548 (2000-06-01), Lasseur et al.
patent: 6214228 (2001-04-01), Jones et al.
patent: 6325935 (2001-12-01), Hojsgaard
patent: 6755972 (2004-06-01), Kouloumbis
patent: 6929744 (2005-08-01), Le
patent: 2004/0011718 (2004-01-01), Arnett et al.
patent: 2004/0025715 (2004-02-01), Bonde et al.
patent: 32 48 703 (1984-07-01), None
patent: 3248703 (1984-07-01), None
patent: 40 00 834 (1990-08-01), None
patent: 4000834 (1990-08-01), None
patent: 3905228 (1990-10-01), None
patent: 0 203 467 (1986-12-01), None
patent: 05-123693 (1993-05-01), None
patent: 95/25071 (1995-09-01), None
patent: WO 01/85627 (2001-11-01), None
Michael & Best & Friedrich LLP
Prince Fred
United Utilities PLC
LandOfFree
Incubation treatment of sludge for pathogen reduction prior... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Incubation treatment of sludge for pathogen reduction prior..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Incubation treatment of sludge for pathogen reduction prior... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4022957