Abstract: A centrifuge includes: a plurality of centrifuge discs each disc having an attachment for attaching a container containing a liquid to be centrifuged; a disc driver positioned to engage and rotate the discs; a disc engager/disengager for individually moving each of said discs into and out of contact with the disc driver; and a controller for controlling which discs are engaged or disengaged from the disc driver and the amount of time each disc is centrifuged. In another embodiment, the centrifuge includes a plurality of disc drivers positioned to engage and rotate the discs, wherein the rotation of discs are controlled by the plurality of disc drivers; and a controller for controlling which discs are rotated by the plurality of disc drivers and the amount of time the discs are centrifuged by individually controlling each disc driver.