Methods, apparatus and systems for polishing wastewater...

C - Chemistry – Metallurgy – 02 – F

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C02F 1/00 (2006.01) B01D 24/02 (2006.01) B01J 20/02 (2006.01) C02F 1/28 (2006.01)

Patent

CA 2677765

Wastewater treatment systems, methods and apparatus for polishing a wastewater stream comprising a plurality of contaminants are provided. One system includes a vessel containing a plurality of natural media filtration agents selected to remove selected ones of the plurality of contaminants from the wastewater stream. In one embodiment, the vessel includes a bed of bauxite residue and at least one other natural media filtration agent. In another embodiment, the vessel includes a bed of compost and at least one other natural media filtration agent. The vessel includes a wastewater inlet that is in fluid communication with one or more of the natural media filtration agents. The vessel includes a wastewater outlet that is in fluid communication with one or more of the natural media filtration agents.

La présente invention concerne des systèmes, procédés et appareils de traitement d'eaux usagées pour nettoyer un courant d'évacuation d'eaux usagées comprenant une pluralité de contaminants. Un système comprend un récipient comprenant une pluralité d'agents de filtration naturelle des éléments, sélectionnés pour éliminer ceux qui sont sélectionnés de la pluralité de contaminants du courant d'évacuation des eaux usagées. Dans un mode de réalisation, le récipient comprend un lit de boue rouge et au moins un autre agent de filtration naturelle d'éléments. Dans un mode de réalisation, le récipient comprend un lit de boue rouge et au moins un autre agent de filtration naturelle d'éléments. Le récipient comprend une arrivée d'eau usagée en communication fluide avec au moins un des agents de filtration naturelle d'élément. Le récipient comprend une sortie d'eau usagée en communication fluide avec au moins un des agents de filtration naturelle d'élément.

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