Method for dewatering of sludge

Details Method for dewatering of sludge Method for dewatering of sludge

1996-09-26

1998-12-08

Wyse, Thomas G.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210728, 210609, C02F 1112

Patent

active

058464352

ABSTRACT:
A chemical method is provided for the dewatering of biological sludge that has been digested by a thermophilic digestion process. Four versions of the chemical method are presented. The primary component in the four versions is a polyquaternary amine, preferably of the di-allyl di-methyl ammonium chloride (DADMAC) variety and from the epichlorohydrin di-methyl amine (epi-DMA) variety. By the first method, the polyquaternary amine is added directly, along with a cationic polyacrylamide, to the biological sludge. By the second method, the polyquaternary amine and an anionic polyacrylamide are added separately. By the third method, a quaternized polyacrylamide, having the polyquaternary amine as part of its polymer chain, is produced by copolymerization of acrylamide with monomers of polyquaternary amine quaternization and is added individually to the sludge. By the fourth method, the quaternized polyacrylamide from method three is added in concert with a cationic polyacrylamide to the sludge.

REFERENCES:
patent: 3994806 (1976-11-01), Rausch et al.
patent: 4690971 (1987-09-01), Flesher et al.
patent: 4784776 (1988-11-01), Mangravite, Jr.
patent: 4996706 (1991-02-01), Gregor
patent: 5093078 (1992-03-01), Hollis et al.
patent: 5112603 (1992-05-01), Nadolsky et al.
patent: 5178774 (1993-01-01), Payne et al.
patent: 5366637 (1994-11-01), Turune
patent: 5529700 (1996-06-01), Kierzkowski et al.
patent: 5643462 (1997-07-01), Chen et al.
patent: 5681480 (1997-10-01), Langley et al.

Affiliated with

Also associated with

Rating

Method for dewatering 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 Method for dewatering of sludge, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for dewatering of sludge will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-173825