A method and apparatus for sedimentation and denitrification of waste water according to the activated sludge process

摘要

A process for the sedimentation and denitrification of waste water after the activated sludge process, with the upstream bio - p - tank (1) with or without scrapers (2) and a structural unit with aeration portion and denitrification part, partition wall, inflow distributor and clear water drain and activated sludge distance in a basin with or without secondary sedimentation tank, wherein an approximately equal to large volumetric flow of waste water - sludge mixture from the inflow distributor (3) in or close to at least one flow opening (13) in the vicinity of the partition wall (14) and / or the basin bottom (15) in the aeration portion (5) and the denitrification part (4) and flows in the aeration portion (5) the to 90 minutes, wherein in the sedimentation part (4), at the same time, sedimentation and denitrification is carried out, and after 30 min clear water via the clear water drain (6) with simultaneous supply of at least 65 volume -% waste water - sludge mixture and up to 35 vol -% slurry water from the aeration portion (5) in the sedimentation part (4) is carried out, wherein a buildup of the water level in the beck share (4,5) is carried out.