As influent is transported through the barrel, it becomes increasingly compressed as the diameter decreases towards the discharge opening. A pneumatic compression cone applies axial pressure to the pressed material for increased dewatering as it begins to exit through the discharge opening. The screen of the perforated compression barrel is specified to enable effective solids capture and water removal. A sloped collection tray catches the water effluent and allows it to flow to the discharge pipe. A gear reducer is utilized to reduce motor input speed and increase torque availability to the driven screw to convey pressed material during the dewatering process.