Removal of phosphorous from wastewater
CA 2555875 C · Owner: Bolduc, Lysane · Inventors: Bolduc, Lysane
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Processes, methods and systems are provided herein for lowering the concentration of phosphorus in wastewater. The process includes adding a suitable amount of an aluminium-based coagulant/flocculent for example, an aluminium-silicate coagulant/flocculent product to the wastewater while maintaining the pH of the wastewater at between about 4.5 and about 6.65. This step provides an eventual effluent stream of precipitated aluminium-based phosphorus-containing flocs dispersed in the wastewater. The next step involves physically removing as by filtering, the precipitated aluminium-based phosphorus-containing flocs which is dispersed in the wastewater. These steps are able to provide a …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed August 11, 2006 and granted March 17, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 11, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.