Method and system for treating radioactive waste water

Details Method and system for treating radioactive waste water Method and system for treating radioactive waste water

C - Chemistry, Metallurgy

02

F

C02F 1/48 (2006.01)

Patent

CA 2633011

A method and apparatus for treating radioactive waste water containing contaminating ions, colloids and suspended solids having like (usually negative) charges preventing their precipitation. An electric current is passed through the waste water in an EC assembly to cause electro-coagulation of the contaminants and anodes of this assembly are made of a metal that dissolves to provide cations for neutralizing the negative charges and forming precipitates containing neutralized contaminants. Precipitates are then separated from waste water by an electro-magnetic or other filtering unit. The water pH and conductivity may be adjusted before the EC assembly and additives may be introduced into its effluent for enlargement of precipitate particles, improvement of filtration, improvement of dewaterability, and/or enhancement of magnetism.

L'invention concerne un procédé et un système de traitement d'eaux usées radioactives contenant des ions contaminants, des colloïdes et des solides en suspension qui renferment des charges de même signe (généralement négatives) empêchant leur précipitation. Un courant électrique traverse les eaux usées placées dans un ensemble d'électrocoagulation (EC) afin d'entraîner l'électrocoagulation des contaminants, les anodes de cet ensemble étant constituées d'un métal qui se dissout pour former des cations destinés à neutraliser les charges négatives et des précipités contenant les contaminants neutralisés. Les précipités sont ensuite séparés des eaux usées à l'aide d'une unité électromagnétique ou d'une unité de filtrage. On peut régler le pH et la conductivité de l'eau avant le réglage de l'ensemble EC et introduire des additifs dans les effluents pour agrandir les particules de précipité et améliorer le filtrage, la capacité de déshydratation et/ou le magnétisme.

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