Biofilter and method for filtering a waste liquid

C - Chemistry – Metallurgy – 02 – F

Patent

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Details

C02F 1/00 (2006.01) C02F 3/30 (2006.01)

Patent

CA 2582132

The biofilter is used for the purification of a waste liquid using layers of filtering material, wherein the waste liquid moves downwardly by gravity while an O2-containing gas moves upwardly therein. The biofilter comprises a gas collector to capture at least a portion of the gas moving upwardly therein to mitigate the problem of biofilter clogging due to a microbial seal at the surface of the uppermost filtering layer.

Le filtre bactérien est utilisé pour la purification d'un résidu liquide à l'aide de couches de matériau filtrant et dans lequel le résidu liquide se déplace vers le bas par gravité, alors qu'un gaz contenant du O2 se déplace vers le haut à l'intérieur dudit filtre. Le filtre bactérien comprend un collecteur de gaz pour capturer au moins une partie du gaz se déplaçant vers le haut à l'intérieur de celui-ci pour atténuer le problème d'obstruction du filtre bactérien en raison d'un scellement microbien formé à la surface de la couche de filtrage supérieure.

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