DEVICE FOR BIOLOGICAL TREATMENT AND POST-TREATMENT OF WASTEWATER AND METHOD OF BIOLOGICAL TREATMENT AND POST-TREATMENT OF WASTEWATER

摘要

Device for biological treatment and post-treatment of wastewater contains biological reactor (1) for biological treatment of wastewater and filtration device (2) for post-treatment of biologically treated wastewater. Filtration device (2) contains pumping chamber (15), sedimentation zone (33), filtration zone (35) with filtration bed (37), with permeable bottom (34) and with accumulation zone (55) for post-treated water located between the upper level of the filtration bed (37) and outlet (30) of the filtration zone (35). The inlet (26) for biologically treated wastewater from biological reactor (1) and outlet (77) serve as outlet for wastewater and sludge from the backflushing of sedimentation zone (33) and filtration zone (35) and are in the sedimentation zone (33) below the permeable bottom (34) of the filtration bed (37) and outlet (77) is connected through connecting pipe (25) to the pumping chamber (15) with suction aperture (19) of the pumping device (17, 63) at the bottom of the pumping chamber (15) and outlet (20) of the pressure pipe (18, 70) from the pumping device (17, 63) leads to the biological reactor (1).