Solid-liquid separator and solid-liquid separation system

A solid-liquid separator comprising:

• a screw type dehydration unit including a screw that includes a first rotary shaft and is configured to feed a supplied object to be processed with rotation of the first rotary shaft, and a layered filter body that surrounds the screw and includes a first filtration groove, the screw type dehydration unit being configured to perform primary dehydration on the object to be processed;
• a rotary-body type dehydration unit including a plurality of rotary bodies that include second rotary shafts and layered rotary filter bodies disposed along axial directions of the second rotary shafts and including second filtration grooves, 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 configured to perform secondary dehydration on the object to be processed on which the primary dehydration has been performed by the screw type dehydration unit;
• a filtrate receiver configured to receive a filtrate that has passed through the first filtration groove of the screw type dehydration unit;
• and
• a reservoir configured to store a filtrate that has passed through the second filtration grooves of the rotary-body type dehydration unit;
• wherein
• the solid-liquid separator is configured to rotate the screw at a higher rotational speed than those of the rotary bodies;
• the screw type dehydration unit and the rotary-body type dehydration unit are integrally provided;
• the solid-liquid separator is configured to separate the filtrate that has passed through the first filtration groove of the screw type dehydration unit from the filtrate that has passed through the second filtration groove of the rotary-body type dehydration unit by the filtrate receiver;
• and
• the reservoir and the filtrate receiver are configured to be integrally provided and not directly give and receive the object to be processed to and from each other.