Sludge thickening method

Details Sludge thickening method Sludge thickening method

2011-03-15

2011-03-15

Hruskoci, Peter A (Department: 1776)

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

C210S710000, C210S780000

Reexamination Certificate

active

07906029

ABSTRACT:
A differential rate rotary thickener; a power detector which is disposed in a sludge receiver tank for thickened sludge thickened in the differential rate rotary thickener; a discriminator which receives an electric signal for a thickened sludge concentration detected by the power detector and which calculates and discriminate the data; a first controller which receives an instruction signal being a discriminated result in the discriminator and which operates an outer cylinder driving machine and a screw driving machine; a ratio setter which receives a discriminated signal of the discriminator and which increases or decreases a chemical feed rate of flocculant stepwise; and a second controller which receives an instruction signal from the ratio setter and which operates a flocculant-feeding pump are provided. Thickening of sludge is performed by controlling the chemical feed rate, a rotational speed of a screw, and a rotational speed of an outer cylinder screen.

REFERENCES:
patent: 3292422 (1966-12-01), Banks
patent: 3777551 (1973-12-01), Weiss
patent: 4041854 (1977-08-01), Cox
patent: 4175425 (1979-11-01), Brookfield
patent: 4544489 (1985-10-01), Campbell et al.
patent: 4705055 (1987-11-01), Rohm et al.
patent: 4781823 (1988-11-01), Shinozaki
patent: 5003814 (1991-04-01), Crawford et al.
patent: 5056358 (1991-10-01), Laskowski et al.
patent: 5382368 (1995-01-01), Sato
patent: 6673247 (2004-01-01), Olson
patent: 2913356 (2007-06-01), None
patent: 58-45886 (1983-10-01), None
patent: 1-39840 (1989-08-01), None
patent: 4-238699 (1992-08-01), None
patent: 5-305253 (1993-11-01), None
patent: 6-25747 (1994-04-01), None
patent: 7-136700 (1995-05-01), None
patent: 10-337598 (1998-12-01), None
patent: 2000-117494 (2000-04-01), None
patent: 2001-179492 (2001-07-01), None
patent: 2002-239314 (2002-08-01), None
patent: 2003-181216 (2003-07-01), None
patent: 2004-017014 (2004-01-01), None
patent: 2004-17014 (2004-01-01), None
patent: 2004-090049 (2004-03-01), None
patent: 2005-138039 (2005-06-01), None
patent: 2005-274250 (2005-10-01), None
patent: 2006-289308 (2006-10-01), None
patent: 2006/112041 (2006-10-01), None
Australian Office Action of patent family member Australian Patent Application No. 2005330884 (Feb. 4, 2009).

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2684577