Improved waste water treatment

C - Chemistry – Metallurgy – 02 – F

Patent

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Details

C02F 3/08 (2006.01) C02F 1/00 (2006.01)

Patent

CA 2097917

Waste water containing biodegradable matter is fed to a rotating biological contactor (RBC) (15) from an inlet tank (10) and is discharged from the RBC-containing chamber into a humus tank (21). The RBC is divided into separated upstream (15A) and downstream (15B) sections, the chamber (17) containing the downstream section being fed with water to be processed at a controlled rate from the chamber (16) containing the upstream section. A balancing chamber, for isolating the downstream section of the RBC from variations in flow of waste water to the inlet tank (10), includes the upstream section (15A, 16) of the RBC which can act sacrificially in respect of toxic incursions in the waste water.

On envoie les eaux usées contenant de la matière biodégradable depuis un réservoir d'entrée (10) vers un dispositif de mise en contact biologique tournant (DCBT) (15) avant de les décharger dans un réservoir d'humus (21) depuis une chambre contenant le DCBT. Le DCBT est divisé en sections séparées amont (15A) et aval (15B), la chambre (17) contenant la section aval étant alimentée en eau devant être traitée à une vitesse contrôlée, par la chambre (16) contenant la section amont. Une chambre d'équilibrage, permettant d'isoler la section aval du DCBT des variations de débit des eaux usées vers le réservoir d'entrée (10), comprend la section amont (15A, 16) du DCBT qui est capable de réagir face à des incursions de nature toxique dans les eaux usées.

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