Liquid purification or separation – Processes – Chemical treatment
Patent
1992-09-04
1993-09-21
Wyse, Thomas
Liquid purification or separation
Processes
Chemical treatment
210751, 210764, 106697, C02F 150, C02F 1114
Patent
active
052465969
ABSTRACT:
Disclosed is a method for processing waste to render it fit for ultimate disposal. The method comprises first contacting together in a reaction mixture the waste stream, an ammonia source capable of evolving ammonia for treating the waste, Ca(OH).sub.2, pozzolanic chemicals SiO.sub.2, Fe.sub.2 O.sub.3, and Al.sub.2 O.sub.3, and at least one pozzolanic accelerator selected from the group consisting of anionic metal silicates, anionic carbon compounds, anionic boron compounds (borate family), anionic phosphorous compounds (phosphate family), and gelling enhancers, in a manner suitable to cause pozzolanic stabilization reactions to occur thereby increasing the solids percentage of the reaction mixture. Next, the reaction mixture is allowed to reach a target temperature of at least about 90.degree. C., to reach a pH of at least about 11.5, and to evolve ammonia gas, thereby forming a heated mixture. Finally, the exposed surface area to mass ratio of the solids in the heated mixture is increased in a manner suitable to release the evolved ammonia gas, thereby neutralizing a substantial portion of the pathogens present in the waste stream and forming a treated waste stream that is suitable for ultimate disposal.
REFERENCES:
patent: 3837872 (1974-09-01), Conner
patent: 3841102 (1974-10-01), Cinner et al.
patent: 3893656 (1975-07-01), Opacic et al.
patent: 4012320 (1977-03-01), Connr et al.
patent: 4471916 (1984-09-01), Donaldson
patent: 4474479 (1984-10-01), Redelman
patent: 4509696 (1985-04-01), Donaldson
patent: 4793927 (1988-12-01), Meehan et al.
patent: 4853208 (1989-08-01), Reimers et al.
patent: 4902431 (1990-02-01), Nicholson et al.
patent: 5013458 (1991-05-01), Christy, Sr. et al.
patent: 5149444 (1992-09-01), Hoch
Baldwin, Jr. Philip N.
Murray Norman K.
LandOfFree
Method of treating waste to make it suitable for ultimate dispos 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 of treating waste to make it suitable for ultimate dispos, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of treating waste to make it suitable for ultimate dispos will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1047424