Device for treating a slurry by separating solids from liquids

A device for treating slurry by separating the solids from the liquids in the slurry, said device comprising:

• a frame for supporting the elements of the machine;
• at least one compartment for separating said solids and liquids, said compartment comprising a base that is concavely curved according to a cylindrical portion having a transverse axis and is formed of a sieve;
• at least one idler roller that is mounted transversely on at least one arm, said arm rotating about a first transverse shaft, a rotational interface also being defined between said arm and said idler roller, which interface allows said idler roller to rotate freely about a second transverse shaft, such that a contact interface is defined between an outer surface of the idler roller and said sieve;
• a subcomponent mounted at the rotational interface between said at least one idler roller and said arm, wherein the subcomponent is made of a non-metal material;
• a drive which rotates said arm about the first transverse shaft;
• and
• resilient means for adjusting the pressure exerted by the rollers on the sieve,
• such that the rotation of the arm presses the slurry entering the machine against the sieve, and said liquids pass through the corresponding sieve,
• wherein the contact interface between the sieve and the roller is made of a non-metal material on at least one of the two contacting surfaces that form said interface, such that, at said interface, there is no metal-on-metal contact between surfaces moving relative to one another.