Method for the microbiological decontamination of soil

Details Method for the microbiological decontamination of soil Method for the microbiological decontamination of soil

B - Operations, Transporting

09

C

B09C 1/10 (2006.01) C12S 99/00 (2010.01)

Patent

CA 2045564

The present invention relates to a method for the microbiological decontamination of soil, in which 1) the contaminated soil is excavated and treated, 2) the treated soil is banked up on a prepared subsoil in the form of regeneration clamps, and 3) the clamps are provided with oxygen while microbiological degradation of the contaminants takes place. The method comprises mixing the contaminated soil with, preferably contaminated, concrete and/or building rubble, before the mixture is banked up in the form of regeneration clamps, the concrete and/or building rubble having been comminuted before mixing to a particle size of ~ 10 mm, preferably ~ 6 mm. The method according to the invention makes possible, within a short time, decontamination even of soils whose permeability for air and water is only low, and also of soils where the distribution of contaminants is highly inhomogeneous, or where the concentration of contaminants is very high. Particularly good results are achieved when the clamps are additionally sprinkled with treated water from the operator's own treatment plant.

Méthode pour la décontamination microbiologique d'un sol, dans laquelle 1) le sol contaminé est extrait et traité, 2) le sol ainsi traité est entassé sur un sous-sol préparé sous forme de silos de régénération, 3) les silos sont traités avec de l'oxygène pendant la dégradation microbiologique des contaminants. La méthode consiste à mélanger le sol contaminé avec, de préférence, des morceaux de béton et (ou) des gravats de construction, avant d'entasser le mélange sous forme de silos de régénération, le béton et les gravats ayant été réduits à une taille de ~ 10 mm, et préférablement ~ 6 mm, avant le mélange. Selon l'invention, il est possible de décontaminer rapidement même les sols à faible perméabilité à l'air et à l'eau, ainsi que les sols où la distribution des contaminants est très peu homogène ou contenant des concentrations de contaminants très élevées. Les résultats sont particulièrement bons lorsque les silos sont en plus aspergés avec de l'eau provenant de la propre station de traitement de l'installation.

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