Ballast water de-toxification treatment system for ships

Details Ballast water de-toxification treatment system for ships Ballast water de-toxification treatment system for ships

C - Chemistry, Metallurgy

02

F

C02F 1/70 (2006.01) C02F 1/50 (2006.01)

Patent

CA 2248706

Methods and compositions for reducing the number of viable organisms present in ship ballast water comprising treating the ballast water so as to reduce the concentration of dissolved oxygen and/or carbon dioxide to a level(s) at which a substantial portion of the organisms present cease to remain viable. Preferably, the method involves treating the ballast water with iron powder so as to reduce the level of dissolved oxygen to 5mgl-1.

L'invention a trait à des procédés ainsi qu'aux compositions correspondantes visant à réduire le nombre de micro-organismes viables présents dans l'eau de ballast d'un navire. Le procédé consiste à traiter l'eau de ballast afin de ramener les teneurs en oxygène dissous et/ou en dioxyde de carbone à des seuils auxquels une partie importante de ces organismes cesse d'être viable. Ce procédé repose, de préférence, sur un traitement de l'eau de ballast à la poudre de fer de façon à ramener le taux d'oxygène dissous à un seuil inférieur ou égal à 5 mg/l?-1¿.

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