RDT is a rotary drum fine screen where the wastewater is tangentially 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 and the screen openings range from 0.5 to 5 millimeters.