The VOLUTE GS dewatering press is equipped with a unique pre-thickening device, the TFU (Thickening Flocculation Unit), which enables the press to achieve excellent results in terms of dry solids content in the dewatered sludge, filtrate clarity, and improving the throughput by up to 50% compared to units without pre-thickening. This press is suitable for dewatering biological sludge even with very low initial concentrations. There is no need to pre-thicken the sludge before dewatering.