SOLID-LIQUID SEPARATION SYSTEM

PROBLEM TO BE SOLVED: To improve separation efficiency to shorten a treatment time, and reduce an installation space.SOLUTION: A solid-liquid separation system, which separates raw water into a solid and treated water by injecting a chemical that forms flocks of the solid in the raw water when the raw water containing a solid flows in, includes: a flocculation tank in which two or more shelf boards are parallelly arranged inside, has a detouring water channel for, when the raw water flows in, detouring the inflow raw water between two of the shelf boards and in a space formed with a cut formed at an end of the shelf board and an inner wall of the flocculation tank, and flows out the raw water containing the flocks formed in the detouring water channel; and a solid-liquid separator which separates the flocks, which is the solid, from the raw water using a centrifugal force when the raw water flowing out of the flocculation tank flows in.