Apparatus and method for treating storm water runoff

Details Apparatus and method for treating storm water runoff Apparatus and method for treating storm water runoff

C - Chemistry, Metallurgy

02

F

C02F 1/28 (2006.01) C02F 1/42 (2006.01) E03F 5/14 (2006.01) E03F 5/16 (2006.01) F16K 31/20 (2006.01)

Patent

CA 2252441

Apparatus and method for the treatment of storm water runoff to remove contaminants that accumulate in the storm water when it flows over paved surfaces in urban areas. The apparatus includes a basket (B) that has an outer surrounding water-permeable wall (10) and an inner water-permeable wall (12), spaced from and surrounded by the outer wall (10). A bed (14) of an absorbent, able to absorb contaminants in the storm water, is disposed in the space between the outer and inner walls, while allowing fluid communication between the walls. An inner drainage space (20) is defined by the inner wall and is in fluid communication with the absorbent and with an outlet for treated water for the basket (B). During operation, a siphon effect is induced causing storm water to be drawn through the bed (14) into the inner space (20), and thence to the drainage conduit (46).

L'invention se rapporte à un appareil et un procédé de traitement des eaux pluviales d'orage, permettant de retirer les contaminants qui s'y accumulent lorsque celles-ci s'écoulent sur les surfaces pavées de zones urbaines. L'appareil comprend un panier (B) qui comporte une paroi périphérique externe perméable à l'eau (10) et une paroi interne également perméable à l'eau (12), espacée de la paroi externe (10) et entourée par celle-ci. Un lit (14) constitué d'un absorbant, capable d'absorber les contaminants contenus dans les eaux de pluie d'orage, est placé dans l'espace située entre les parois externe et interne tout en permettant la communication fluidique entre celles-ci. Un espace de drainage interne (20) est formé par la paroi interne et est en communication fluidique avec l'absorbant

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