Biological contactor for purifying water to produce drinking...

Details Biological contactor for purifying water to produce drinking... Biological contactor for purifying water to produce drinking...

C - Chemistry, Metallurgy

02

F

362/10

C02F 3/06 (2006.01) B01D 15/00 (2006.01) C02F 1/28 (2006.01) C02F 3/00 (2006.01) C02F 3/10 (2006.01) C02F 3/12 (2006.01) C02F 3/20 (2006.01)

Patent

CA 2004299

A biological contactor (8) comprises a granular bed including a layer (17) based on activated carbon the material of which satisfies the following conditions: . density between 0.18 and 0.32 g/cm3, . carbon tetrachloride adsorbing power between 60% and 120% by weight, . carbon tetrachloride retention less than 25% by weight of the carbon tetrachloride adsorbed mass, . methylene blue: between 5 and 30 ml, . particle size: between 0.5 and 1.5 mm effective size with a coefficient of uniformity less than 2. A washing cycle (21, 24) (air only; air plus water; water only) of the contactor is triggered (38) when a parameter (36, 37) representative of the population of algae in said layer reaches a predetermined set point threshold.

Un contacteur biologique (8) constitué d'un lit granulaire comprenant une couche (17) à base de charbon activé; la composition du lit satisfait aux conditions suivantes : masse volumique entre 0,18 et 0,32 g/cm3, pouvoir d'absorption du tétrachlorure de carbone entre 60 % et 120 % en poids, rétention du tétrachlorure de carbone inférieure à 25 % en poids de la masse adsorbée de tétrachlorure de carbone, bleu de méthylène : entre 5 et 30 ml, granulométrie : entre 0,5 et 1,5 mm, taille effective avec un coefficient d'uniformité inférieur à 2. Un cycle de lavage (21, 24) (air seulement; air plus eau; eau seulement) du contacteur est déclenché (38) lorsqu'un paramètre (36, 37) représentatif de la population d'algues dans ladite couche atteint un point de consigne prédéterminé.

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