Abstract: A centrifugal separator adapted for treating various liquids has a stack of trays set on a drive shaft. To keep the trays somewhat apart from one another, disks are interposed between the trays and provided with holes open along their periphery. The trays are provided with disk and tray holes coaxial with the holes in the disks. The holes form ducts for feeding the polluted liquid and ducts for discharging the purified liquid, both ducts passing parallel to the shaft axis. The liquid is passed from one duct to the other along an arc of a circle in the intertray space. The effect of the flow of the liquid on the settling of solids is insignificant, which enables higher efficiency of the process. The present invention can be applied in diverse fields of technology, where separation of different-density substances is involved.