Method for purifying industrial sewage water

C - Chemistry – Metallurgy – 02 – F

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C02F 1/52 (2006.01) C02F 1/58 (2006.01) C02F 9/00 (2006.01)

Patent

CA 2120989

The present invention relates to a method for purifying contaminated industrial sewage water solutions or other aqueous solutions having a similar contaminant profile, normally containing ions of several metals and other elements such as As, Bi, Sb, P and Se, by precipitation in two stages and by returning the precipitate separated from the second precipitation stage to the first precipitation stage. Precipitation is effected in a first stage by adding lime in a surplus quantity, wherewith the major part of the contaminant content is precipitated. The formed precipitated is isolated and removed together with residual lime. Precipitation of remaining contaminant content is effected by adding a suitable reagent for precipitation at a pH in the range of 4-11, and formed precipitate is isolated and returned to the first precipitation stage, either directly or indirectly.

Le présent brevet porte sur une méthode de purification des eaux industrielles contaminées ou d'autres solutions aqueuses ayant un profil de contaminants similaire, contenant en général des ions de plusieurs métaux et d'autres éléments comme As, Bi, P et Se, par précipitation en deux étapes et retour à la première étape du précipité formé lors de la deuxième précipitation. La précipitation est effectuée à la première étape par addition d'un excès de chaux, ce qui permet la précipitation de presque tout le contenu en contaminants. Le précipité formé est isolé et éliminé avec la chaux résiduelle. La précipitation du reste de contaminants est effectuée par addition d'un réactif approprié qui permet la précipitation à un pH compris entre 4 et 11 et le précipité formé est isolé et retourné à la première étape de précipitation, directement ou indirectement.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

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

Rate now

     

Profile ID: LFCA-PAI-O-1798280

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.