Anaerobic purification device

C - Chemistry – Metallurgy – 02 – F

Patent

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Details

C02F 3/28 (2006.01)

Patent

CA 2605963

The present invention relates to an anaerobic purification device for purification of influent, comprising: a reactor tank; inlet means for introducing influent into the tank; water collecting means for collecting purified water; a gas collecting system for collecting gas from the fluid contained in the reactor; a gas-liquid separation device; a riser for passing liquid into the separation device by gas lifted caused by gas collected in the gas collecting system; a downer for returning liquid and sludge from the separation device into the lower tank section . According to the invention this device is characterized in that it is arranged to define, in the downer at the level of the liquid surface, a head pressure of at least about 1.4 m water column (about 0.14 bar). The invention also relates to a method for anaerobic purification device for purification of influent.

La présente invention concerne un dispositif d~épuration anaérobie destiné à purifier un influent, comprenant : une cuve à réaction ; des moyens d~entrée pour introduire l~influent dans la cuve ; des moyens de recueil d~eau pour recueillir l~eau purifiée ; un système de recueil de gaz pour recueillir le gaz provenant du fluide contenu dans la cuve à réaction ; un dispositif séparant le gaz du liquide ; une colonne montante pour faire passer le liquide dans le dispositif de séparation à l~aide d~un gaz montant produit par le gaz recueilli dans le système de recueil de gaz ; une colonne descendante pour ramener vers la section inférieure de la cuve le liquide et la boue provenant du dispositif de séparation. Selon l~invention, ce dispositif se caractérise en ce qu~il est disposé de manière à définir une pression de tête d~au moins 1,4 m de colonne d~eau (environ 0,14 bar) dans la colonne descendante au niveau de la surface liquide. L~invention porte également sur un procédé d~épuration anaérobie destiné à purifier un influent.

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