These dewatering drums are applied in screening and thickening of pulper rejects. Drum is installed in inclined position, with loading mouth directly in contact with the ditch of channel for collecting the waste from one or more pulpers. Because of its inclined position, the water drainage, contaminant washing, lifting and transport stages can be carried out simultaneously, thus facilitating the feeding of the compactors. Length of perforated part with holes is 3m, followed by not perforated part of 3,75m length.