Particle setting devices

A method of settling particles in a suspension, comprising:

• (a) introducing a liquid suspension of particles into a particle settling device which includes a cyclone housing having:
• a first conical portion;
• a second conical portion;
• a cylindrical portion located between the first and second conical portions;
• at least one inlet for the liquid suspension to enter the cyclone housing;
• a first outlet port for harvesting a clarified liquid;
• a second outlet port for discharging a concentrated liquid suspension;
• and
• a first stack of cones located within the cyclone housing and occupying the first conical portion and at least part of the cylindrical portion, each cone of the first stack of cones including (i) a truncated apex positioned distal to the second conical portion, and (ii) an open base positioned proximate to the second conical portion, the first stack of cones being generally centered around a substantially central opening formed by the truncated apex in each cone in the first stack of cones;
• (b) collecting the clarified liquid from the first outlet port;
• and,
• (c) collecting the concentrated liquid suspension from the second outlet port.