SETTLING BASIN, SAND REMOVAL METHOD, TRANSPORT SYSTEM AND CONTAMINANT REMOVAL METHOD

摘要

The present invention relates to a settling basin in which sand contained in received water settles and provides a settling basin, which is designed to adequately move the sand while limiting the swirling up of the sand. The settling basin is provided with: a space-forming member (8), which extends along the basin bottom (1a), forms a space (S2) the upper edge (82) of which is closed, and is provided with an intake opening (81) below the upper edge (82) and at a distance from the basin bottom (1a); and a discharge port (7) for discharging fluid inside the space (S2). The intake opening (81) functions as an opening for drawing in sand, which has accumulated in the basin bottom (1a), into the space (S2) as a result of fluid being discharged from the discharge port (7). The space-forming member (8) functions as a pathway for sand that has been drawn into the space (S2) to move towards the downstream side of the fluid discharge direction as a result of fluid being discharged from the discharge port (7).