EQUIPMENT FOR SEWAGE TREATMENT WITH BIOLOGICALLY ACTIVATED Sludge AND METHOD FOR ITS OPERATION

摘要

1. Equipment for treating wastewater containing organic pollutants, in particular municipal wastewater and / or wastewater from the food industry, containing a main reactor (I) and a preceding reactor (II), as well as means for supplying untreated wastewater, removing purified water and sludge and aeration of wastewater entering the main reactor, and a mixer (2) placed in the previous reactor (II), while the main reactor (I) and the previous reactor (II) are separated from each other by a separating wall (12), and between the main reactor m (I) and the preceding reactor (II) is located at least one device for recycling wastewater, characterized in that said device comprises a U-shaped pipe section (15), provided with sleeves (16a, 16b) for recycling, one sleeve (16a) of the U-shaped pipe section (15) is located in the previous reactor (II), the other sleeve (16b) of the U-shaped pipe section (15) is located in the main reactor (I), and they are separated from each other by a dividing wall (12), the lower end of one sleeve (16a) and the lower end of the other sleeve (16b) are connected to the pipe, passing through the dividing wall (12), and their upper ends are located at a height corresponding to the minimum water level (v) determined for a given reactor, the air duct (13) with an end fitting (13a), which performs the function of airlift, is connected to another sleeve (16b ) U-shaped pipe section (15) located in the main reactor (I), and at a given distance (t) from the upper end (15a) of one sleeve (16a) and the upper end of the other sleeve (16b) there is an overflow hole (8) in the dividing wall (12), providing recirculation. 2. Equipment