Vertical oil-water separation process tank and road surface drainage treatment facilities, as well as the precast assembly block of road surface drainage

摘要

PROBLEM TO BE SOLVED: To provide a surface drainage treatment installation, capable of being constructed in a narrow site such as road side slope or the like of highways or the like, efficiently separating and eliminating earth and sand, oil or the like contained in the surface drainage and excellent in maintenance and performance.;SOLUTION: An inflow tank 10 and a separation tank 20 are provided along a drain gutter 4 constructed in the road side slope 3, by arranging them in the vertical direction, the surface drainage treatment installation 1 consisting of the flow in the tank 10 and the separation tank 20 is connected to an inflow gutter 6 branching off by a weir 5 from the drain gutter 4, inflow force is lowered by the inflow tank 10 to settle sludge in the surface drainage, oil and water are separated by the difference in specific gravity by a flow-adjusting section 21 of the separation tank 20 on the following stage, and water content settled downward is supplied to an outflow section 28 from a linking passage, which is formed in the lower side of a partition plate 25 to discharge it to a downstream side drain gutter 8 located at the outside of the tank through a discharge pipe 29 with siphon effect.;COPYRIGHT: (C)2001,JPO