Round clarification tank for turbid water, having pure water outlet with larger inner and smaller outer inlets to prevent discharge of light sludge

摘要

In a round clarification tank (2) including an inlet for turbid water, a bottom outlet for sedimented sludge and a round or polygonal outlet for pure, clarified water, the pure water outlet has an inner inlet (10) in the center of the inner wall (6) (facing the center of the tank) and an outer inlet (11) in the center of the outer wall (7) (facing the casing (4) of the tank), the inner inlet having a greater clarified water throughflow capacity than the outer inlet.