WASTEWATER TREATMENT UNIT AND METHOD FOR TREATING WASTEWATER

摘要

The wastewater treatment unit is operable under high intermittent flow rate variations. It comprises a first clarifier followed by a second clarifier including a network of parallel plates inclined with respect to the vertical and a collecting pit. Each plate has an upper edge positioned at a height lower than the filling level of the first clarifier to define an overflow giving access to the collecting pit. A filtering chamber is positioned above the first clarifier and comprises a biomass for further treating the wastewater coming from the second clarifier. The filtering chamber has an outlet in fluid communication with the inlet of the first clarifier for recirculation purposes. The unit also comprises a third clarifier for further treating wastewater coming from a second outlet of the second clarifier and an outflow controller located at the outlet of the third clarifier.