A method of separating a solid/liquid mixture by rotating it at high speed in a cylindrical container. The solid will remain on the sides (through centrifugal force) while the liquid goes to the drain. Centrifugation is also used in extracting cannabinoid-rich substances from cannabis. A cannabis extraction centrifuge is an industrial centrifuge that continuously separates the biomass from the solvent with the THC oil absorbed in it. A horizontal decanter centrifuge exerts over 3,000 times the gravity force to separate the solvent’s depleted cannabis cuttings.