How does a continuous-flow centrifuge differ from a batch centrifuge?

Centrifuges are categorized by their operational process: continuous-flow or batch. The primary difference lies in how the material is processed and handled within the centrifuge.1

• Continuous-flow centrifuges: These are designed for processes where material enters the device at one end near the axis of rotation and is discharged in two separate streams after the centrifugal force has acted upon it. This allows for the ongoing separation of liquids from liquids or fine particles from liquids as the fluid flows through the rotating bowl.2
• Batch centrifuges: These operate by treating a fixed quantity of material at one time. In this process, the material is placed in containers—such as the test tubes or bottles used in bottle centrifuges—and the separation occurs until the process is stopped to collect the sediment or clarified fluid. Even some tubular centrifuges, which are typically used for continuous flow, may be operated as batch centrifuges if the solid material is allowed to deposit on the wall rather than being continuously discharged.132