ANORDNING FOR OPPARBEIDELSE AV AVFALLSVANN

摘要

Used for nitrification and denitrification in biological waste water treatment is a container (1) in the form of a tower in which a pipe (10) with a casing arranged at a distance from the container wall is arranged entirely immersed under the level of liquid. The upper open face (11) of the pipe (10) is thus, just like the lower open face (13), below the level of liquid. The biomass inlet opens into the annular space (15) or the central space of the pipe (10), and the discharge takes place in each case from the other space. One of the two spaces is additionally aerated, the aeration taking place from below, and the liquid phase flowing downwards through the other space becoming depleted in oxygen.