G - Physics – 21 – F
Patent
G - Physics
21
F
G21F 9/18 (2006.01) C09K 3/32 (2006.01)
Patent
CA 2211104
A process for treating oils and solvents contaminated by radioactive substances includes a step of subjecting the oils and solvents to the action of pre-selected micro--organisms in the presence of air and a very large volume of water, relative to the volume of oils and solvents to be treated. The micro-organisms destroy organic molecules, and in particular transform them into CO2 and H2O. Further steps of the process include preparing a predetermined volume of water having predetermined characteristics of dissolved oxygen concentration, pH and redox potential and adding a predetermined charge of oils and solvents contaminated by radioactive substances to this volume of water, the charge corresponding to a volume of oils and solvents which is a predetermined fraction of the predetermined volume of water. The charge is subjected to the action of micro-organisms at a predetermined temperature and for a predetermined time period. At least a portion of the effluent obtained is removed and the water is separated from the substances contained in the effluent. The substances separated from the water are recycled or removed. The water from which the substances contained in the effluent have been removed is regenerated so that it regains the aforementioned predetermined characteristics. At least a portion of the regenerated water is recycled and the cycle is repeated from the step of preparing the predetermined volume of water.
Le procédé comporte les étapes suivantes: a) on prépare un volume prédéterminé d'eau ayant des caractéristiques prédéterminées en matière de teneur en oxygène dissous, pH et potentiel REDOX; b) on ajoute dans ce volume d'eau une charge prédéterminée d'huiles et de solvants contaminés par des substances radioactives, ladite charge correspondant à un volume d'huiles et de solvants qui est une fraction prédéterminée du volume d'eau prédéterminé; c) on soumet cette charge à l'action des micro-organismes à une température et pendant une durée prédéterminées; d) on prélève au moins une partie de l'effluent obtenu; e) on sépare l'eau des matières contenues dans cet effluent; f) on recycle ou on évacue lesdites matières séparées de cette eau; g) on régénère cette eau débarassée des matières contenues dans l'effluent, de façon à lui redonner lesdites caractéristiques prédéterminées; h) on recycle au moins une partie de cette eau régénérée; i) on recommence le cycle à partir de l'étape a).
Deguitre Joanes Pierre
Stingre Maurice
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Deguitre Joanes Pierre
Richmond Agency Limited
Stingre Maurice
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