The three-phase horizontal screw-discharge sedimentation centrifuge operates on a principle similar to that of the standard horizontal screw-discharge sedimentation centrifuge. Based on differences in solid density, it utilizes a centrifugal force field to achieve sedimentation and stratification. The lighter liquid phase moves closer to the axis of rotation, while the heavier liquid phase moves closer to the inner wall of the drum. with the heaviest solid phase settling on the inner wall of the drum. The light and heavy liquid phases are discharged through specially designed separate channels, while the solid phase is discharged by a screw conveyor.