Method for purifying effluent in an anaerobic reactor

Details Method for purifying effluent in an anaerobic reactor Method for purifying effluent in an anaerobic reactor

C - Chemistry, Metallurgy

02

F

C02F 3/28 (2006.01)

Patent

CA 2606062

The invention relates to a method for purifying effluents in an anaerobic reactor (1) in which the micro-organisms are held by supports, said supports forming a bed which is fixed in a part (4, 5) of the reactor. The inventive method is characterised in that it comprises a step wherein the reactor is backwashed once it has been at least partially clogged, by temporarily suspending the supports. Advantageously, the method comprises an initial step for starting the reactor, during which the load of the reactor is increased with a short and constant hydraulic residence time.

L'invention concerne un procédé d'épuration d'effluents en réacteur (1) anaérobie dans lequel les microorganismes sont retenus par des supports, les supports formant un lit fixe dans une partie (4, 5) du réacteur, caractérisé en ce qu'il comporte l'étape consistant à procéder à un décolmatage du réacteur une fois qu'il est au moins partiellement colmaté, par mise en suspension temporaire des supports. Avantageusement, le procédé selon l'invention comporte une étape initiale de démarrage du réacteur pendant laquelle on réalise une montée en charge du réacteur à TSH court et constant.

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