Fixation of heavy metals in scrubbed municipal solid waste...

Details Fixation of heavy metals in scrubbed municipal solid waste... Fixation of heavy metals in scrubbed municipal solid waste...

B - Operations, Transporting

09

B

B09B 3/00 (2006.01) C04B 7/34 (2006.01) A62D 3/00 (2006.01)

Patent

CA 2077509

Fly ash generated from incineration of municipal solid waste (MSW) when placed in landfills under mild acid conditions can leach lead and cadmium. A process for stabilizing heavy metals in this fly ash is presented which involves calcining in the presence of an oxygen containing gas stream at a temperature greater than about 375°C and substantially less than about 800°C for times from about 170 seconds up to about 5 hours fly ash which has been subjected to lime scrubbing for acid gas removal. Such treated MSW fly ash will give leachates containing heavy metal concentrations less than the EPA regulatory limit.

Les cendres volantes provenant de l'incinération de déchets urbains solides (DUS) peuvent, lorsqu'ils sont déversés dans des décharges, conduire au lessivage de plomb et de cadmium. On présente une méthode pour stabiliser les métaux lourds dans ces cendres, consistant à calciner dans un courant gazeux oxygéné à une température supérieure à environ 375 °C et sensiblement inférieure à 800 °C approximativement, pendant une période comprise à peu près entre 170 secondes et 5 heures, des cendres volantes qui ont été soumises à une purification par la chaux pour l'élimination des gaz acides. Ces cendres volantes de DUS ainsi traitées donnent des produits de lessivage renfermant des concentrations de métaux lourds inférieures aux limites fixées par l'EPA.

Affiliated with

Also associated with

Rating

Fixation of heavy metals in scrubbed municipal solid waste... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fixation of heavy metals in scrubbed municipal solid waste..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fixation of heavy metals in scrubbed municipal solid waste... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1582678