Abstract: The invention relates to an apparatus for the removal of clarified waste water from circular tanks which have a central waste-water inlet. It is notable for a submerged pipe which is constructed as a ring conduit provided concentrically with the vertical axis of the ring tank and is arranged underneath the surface of the clarified waste water in order to draw off the clarified waste water uniformly, the drainage of the latter being regulatable independently of the incoming amount by means of a control system and the water level in the tank being controllable in a constant manner by means of said system.

Abstract: The invention relates to a device for the removal of clarified waste water from rectangular basins, which device has at least one completely filled submerged pipe (16; 16) disposed underneath the water surface in the rectangular basin, the arrangement and design of said pipe being of the type suitable for a two-dimensionally uniform take-off of the clarified waste water over the entire basin (10).

Abstract: The invention relates to an apparatus for the removal of clarified waste water from circular tanks which have a central waste-water inlet. It is notable for a submerged pipe which is constructed as a ring conduit provided concentrically with the vertical axis of the ring tank and is arranged underneath the surface of the clarified waste water in order to draw off the clarified waste water uniformly, the drainage of the latter being regulatable independently of the incoming amount by means of a control system and the water level in the tank being controllable in a constant manner by means of said system.