The rubber belt vacuum filter uses filter cloth as the filter medium, and is a separation device that makes full use of material gravity and vacuum suction to achieve solid-liquid separation. The integral annular rubber belt is used as the vacuum chamber. The ring-shaped belt is driven by the motor to run continuously, and the filter cloth is laid on the belt to run synchronously with it, and the belt contacts the ring-shaped friction belt on the vacuum slide table to form a water seal.

External rotary drum screen is one of the pretreatment solid separating devices used for small and medium waste-water treatment plants, and a device which can remove solid suspended matter continuously and effectively.