Liquid purification or separation – Flow – fluid pressure or material level – responsive – Check valve
Patent
1996-04-23
1998-06-23
Wyse, Thomas G.
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Check valve
210206, 210219, 210220, 210256, B01D 2124
Patent
active
057700567
ABSTRACT:
A process of dewatering primary-treated sewage which includes mixing the sewage with a coagulant or flocculant aid, usually activated polymer. The sewage is then mixed and flocculated at conditions which involve extensive mixing turbulence of the sewage and whereby part of the sewage is recycled so as to be again subjected to such mixing and flocculating. Flocks form the solid particles in the sewage. The pH of the sewage is chemically adjusted into the basic pH range or to a higher basic pH. The sewage is applied to a sand bed whereby the flocculated solids in the sewage are separated from the liquid in the sewage, by collecting on the top of the sand bed. The flocculated solids located on the top of the sand bed are air dried. The dried flocculated solids are removed from the top of the sand bed.
REFERENCES:
patent: 3579443 (1971-05-01), Horst
patent: 3852192 (1974-12-01), Fassell et al.
patent: 4000227 (1976-12-01), Garrett
patent: 4522502 (1985-06-01), Brazelton
patent: 4642222 (1987-02-01), Brazelton
patent: 4688945 (1987-08-01), Brazelton
patent: 4778280 (1988-10-01), Brazelton
patent: 4925019 (1990-05-01), Ganz et al.
patent: 5018871 (1991-05-01), Brazelton et al.
patent: 5061456 (1991-10-01), Brazelton et al.
patent: 5160041 (1992-11-01), Taniguchi et al.
patent: 5164429 (1992-11-01), Brazelton et al.
patent: 5248416 (1993-09-01), Howard, Jr.
patent: 5252635 (1993-10-01), Brazelton et al.
patent: 5284626 (1994-02-01), Brazelton et al.
patent: 5284627 (1994-02-01), Brazelton et al.
"Control of Pathogens and Vector Attraction in Sewage Sludge", EPA/625/R-92/013, (Dec. 1992), title page and p. 37.
LandOfFree
Sewage dewatering equipment does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Sewage dewatering equipment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sewage dewatering equipment will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1391672