Solid-Liquid Separator and Solid-Liquid Separation System

A solid-liquid separation system (100) comprising:

• a screw type dehydration unit (2) including a screw (22) that includes a first rotary shaft (22a) and feeds a supplied object to be processed with rotation of the first rotary shaft, and a layered filter body (23) that surrounds the screw and includes a first filtration groove (S1), the screw type dehydration unit that performs primary dehydration on the object to be processed;
• a rotary-body type dehydration unit (3) including a plurality of rotary bodies (30) that include second rotary shafts (30b) and layered rotary filter bodies (30a) disposed along axial directions of the second rotary shafts and including second filtration grooves (S2), the plurality of rotary bodies disposed in two upper and lower rows, the rotary-body type dehydration unit disposed subsequent to the screw type dehydration unit and that performs secondary dehydration on the object to be processed on which the primary dehydration has been performed by the screw type dehydration unit;
• a tank (1) integrally including a filtrate receiver (11) that receives a filtrate that has passed through the first filtration groove of the screw type dehydration unit and a reservoir (10) partitioned from the filtrate receiver and that stores a filtrate that has passed through the second filtration grooves of the rotary-body type dehydration unit;
• and
• a mixing tank (6) to which the object to be processed is supplied from the tank, that flocculates and flocs a solid component of the supplied object to be processed, and supplies the object to be processed to the screw type dehydration unit;
• wherein
• the screw rotates at a higher rotational speed than those of the rotary bodies.