Pre- and post-treatment system and method for aquatic plant...

C - Chemistry – Metallurgy – 02 – F

Patent

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C02F 3/32 (2006.01) C02F 1/78 (2006.01) C02F 9/04 (2006.01) C02F 9/14 (2006.01) C02F 1/32 (2006.01) C02F 1/52 (2006.01)

Patent

CA 2476733

A process for treating water to remove concentrations of nutrients and pollutants using ozone prior or after the water is exposed to natural filtration by periphyton or other aquatic plants. A system employs a deep water tank (11) containing water to be treated. Concentrated ozonated water is injected via a pipe (16) at the bottom of the tank (11) to expose the water to be treated with ozone. The treated water exits from the top of the tank (11) via a nozzle (18) whereby it is flowed over an aquatic plant system (22) to remove undesired matter, such as pesticides. The process can be repeated successively to further treat the water if desired.

L'invention concerne un procédé de traitement de l'eau permettant d'éliminer des concentrations de nutriants et de polluants au moyen d'ozone, avant ou après l'exposition de l'eau à une filtration naturelle par un périphyton ou d'autres plantes aquatiques. Un système met en oeuvre un réservoir en eau profonde renfermant de l'eau à traiter, de l'eau ozonée concentrée étant injectée au niveau du fond de celui-ci, de manière à exposer l'eau à traiter à l'ozone. L'eau traitée sort de la partie supérieure du réservoir, s'écoulant ainsi sur un système de plantes aquatiques, de manière à éliminer les substances non souhaitées, telles que des pesticides. Le procédé peut être répété de manière successive, aux fins de traitement ultérieur de l'eau selon les besoins.

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