Processes for the treatment of a waste material having a...

Details Processes for the treatment of a waste material having a... Processes for the treatment of a waste material having a...

C - Chemistry, Metallurgy

02

F

C02F 1/66 (2006.01) B09B 3/00 (2006.01) C01F 7/06 (2006.01) C02F 11/00 (2006.01)

Patent

CA 2491353

A process for the treatment of a waste material containing species having a high alkalinity and/or pH is disclosed. The process comprises the steps of contacting the waste material with a first treatment material such as sea water concentrated by evaporation. The amount of the first treatment material is sufficient to cause at least some of the alkaline species to be inactivated, thereby resulting in a treated waste material. The process may also include a step of separating the treated waste material into solid and liquid phases and then contacting the liquid phase with a sufficient amount of a second treatment material having a low pH, so as to cause at least one of the pH and alkalinity of the liquid phase to be reduced to an environmentally acceptable level.

L'invention concerne un procédé de traitement de déchets contenant des espèces possédant un pH et/ou une alcalinité élevé(s). Ce procédé consiste à mettre en contact les déchets avec un premier matériau de traitement tel que de l'eau de mer concentrée par évaporation. La quantité du premier matériau de traitement est suffisante à entraîner l'inactivation d'au moins quelques espèces alcalines, ce qui permet d'obtenir des déchets traités. Le procédé peut également consister à séparer les déchets traités en phases solides et liquides, puis à mettre en contact la phase liquide avec une quantité suffisante d'un second matériau de traitement possédant un pH faible, de manière à entraîner la réduction du pH et/ou de l'alcalinité de la phase liquide à un niveau acceptable sur le plan écologique.

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