Abstract: Sweeper means for circular settling basins wherein at least a pipe is supported by a radially extending support structure adapted to be rotated about a central vertical axis by driving means, wherein further the discharge end of the pipe being connected to a sewage sludge return line which is extended below the settling basin and extended into the basin in the central area thereof and which is adapted to deliver the sewage sludge outwards of the settling basin, the support structure being suspended on a vertical rotary shaft coupled to the driving means, the other end of the pipe moving in conjunction with the support structure being connected to a rotary connection below the level in said settling basin to which also the sludge return line is connected.