WATROMAT® belt sludge dryer uses a drying tunnel and conditioned dried air to reduce sewage sludge storage volume and weight. WATROMAT® belt sludge dryer is suited for sewage sludge dewatered by belt filter press, centrifuge, decanter or screw press. Sewage sludge will be distributed on a perforated belt, transported slowly through a sludge tunnel, and softly dried by conditioned dry air. WATROMAT® belt sludge dryer works in an emission free closed system and without odour.