The rotodrum is a fine screen, with rotating wedge-wire drum. The water is introduced into the screen through a special distribution headbox. Solids are captured inside the cylinder, thickened and continuously discharged to the outlet, while the filtrate flows through the opening of the wedge-wire. The Rotodrum is completely manufactured in stainless steel. The screen openings range from 0,5 to 5 millimeters.