Sludge treatment method

Details Sludge treatment method Sludge treatment method

2008-01-22

2008-01-22

Hruskoci, Peter A. (Department: 1724)

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

C210S609000, C210S718000, C210S721000, C210S760000, C210S906000

Reexamination Certificate

active

07320759

ABSTRACT:
A sludge treatment method allowing an improvement in a phosphorus recovery rate and sludge volume reduction by efficiently eluting phosphorus in the sludge. The sludge treatment method includes: a step of foaming a sludge-containing liquid by blowing an ozone-containing gas into the sludge-containing liquid; and a step of eluting phosphorus in the sludge-containing liquid by bringing sludge adsorbed on bubbles and a sludge-dissolving agent into contact with each other. The sludge treatment method may further include the steps of: separating the phosphorus eluted sludge-containing liquid into a phosphorus eluate and a residual sludge; and precipitating a phosphorus compound by adding a coagulant to the separated phosphorus eluate.

REFERENCES:
patent: 4689154 (1987-08-01), Zimberg
patent: 5275639 (1994-01-01), Sullivan et al.
patent: 5914040 (1999-06-01), Pescher et al.
patent: 6077431 (2000-06-01), Kawanishi et al.
patent: 6106717 (2000-08-01), Hasegawa et al.
patent: 6146521 (2000-11-01), Yasui
patent: 6303034 (2001-10-01), Kamiya et al.
patent: 6451276 (2002-09-01), Saran et al.
patent: 6706185 (2004-03-01), Goel et al.
patent: 6800196 (2004-10-01), Matsuo et al.
patent: 7070747 (2006-07-01), Yasunaga et al.
patent: 0 903 325 (1999-03-01), None
patent: 8-267099 (1996-10-01), None
patent: 10-15597 (1998-01-01), None
patent: 10-156381 (1998-06-01), None
patent: 2002-263676 (2002-09-01), None
patent: 2003-200193 (2003-07-01), None
Nozomu Yasunaga, et al., “Recovering Phosphates from Sewage Sludge”, Mitsubishi Electric Advance, Dec. 2003, pp. 17-20.

Affiliated with

Also associated with

Rating

Sludge treatment method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sludge treatment method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sludge treatment method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2802191