The screw press consists of a horizontal screw conveyor which collects and transports the waste in a closed mesh drum. The mesh drum ends in a cone which is sealed by a hatch which exerts counter-pressure through a counterweight.
The counter-pressure ensures that the transport screw presses the water out of the waste. The pressed-out water is discharged underneath the waste press. The dry waste is pressed out through the cone at the front of the machine and can be collected in a container.