Apparatus for reducing volume of sludge

Details Apparatus for reducing volume of sludge Apparatus for reducing volume of sludge

2007-07-20

2008-10-21

Barry, Chester T. (Department: 1797)

Liquid purification or separation

Recirculation

Serially connected distinct treating or storage units

C210S202000

Reexamination Certificate

active

07438805

ABSTRACT:
The pH value of excess sludge taken out from a biological oxidation tank (2) is adjusted to 8 to 14, and the pH-adjusted sludge is injected into a solubilizing device (3). The sludge taken out from the solubilizing device (3) is heated to 110° C. to 350° C. at a pressure higher than saturated steam pressure to solubilize the sludge to a state readily degradable by microorganisms. The solubilized sludge is returned to a biological oxidizing tank (2), and the pH value of the sludge in the biological oxidizing tank (2) to 5 to 9. The use of the above method of treating excess sludge and an apparatus therefore enables substantially reducing the volume of excess sludge with economic advantage.

REFERENCES:
patent: 4649031 (1987-03-01), Matyas et al.
patent: 5369031 (1994-11-01), Middleditch et al.
patent: 5417862 (1995-05-01), Bergemann et al.
patent: 5540847 (1996-07-01), Stultz et al.
patent: 6110323 (2000-08-01), Marsland
patent: 6224769 (2001-05-01), Hasegawa et al.
patent: 7258791 (2007-08-01), Matsumoto
patent: 2004/0004038 (2004-01-01), Yamaguchi et al.
patent: 129270 (1978-01-01), None
patent: 55-8835 (1980-01-01), None
patent: 8-39096 (1996-02-01), None
patent: 9-136100 (1997-05-01), None
patent: 10-80699 (1998-03-01), None
patent: 11-300393 (1999-11-01), None
patent: 2000-218295 (2000-08-01), None
patent: 2001-79584 (2001-03-01), None
patent: 2001-225091 (2001-08-01), None
patent: 2003-117597 (2003-04-01), None

Affiliated with

Also associated with

Rating

Apparatus for reducing volume of sludge does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for reducing volume of sludge, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for reducing volume of sludge will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3994211