Watropur GmbH
About
Watropur GmbH, an ISO 9001-certified manufacturer headquartered in Duren, Germany with Swiss parent Watropur SZ GmbH in Unterseen, has produced sludge dewatering and drying equipment since 1992. The company operates over 33,500 m2 of production facilities across Croatia, China, Hungary, and Switzerland with approximately 120 employees and global subsidiaries in South Korea, Malaysia, and Croatia. Their flagship WATROMAT Press-Dryer (WPD) combines a screw press and belt dryer in a single integrated system, processing sludge from 2% dry solids inlet up to 90% dry solids outlet at just 30C with energy consumption of only 0.33 kWh per kg of water separated — available in ten models from WPD0508 (0.5 t/day DS, 14 kWh power) through WPD50240D (5.0 t/day DS, 320 kWh), with D-series models featuring dual-unit configurations delivering higher water removal in a compact 2.0 m wide footprint. The WATROMAT Screw Press (WSP) series provides standalone dewatering from 0.5-8% DS inlet to 20-35% DS outlet using a conical screw shaft with pneumatic counter-pressure cone, in seven models from 500 to 15,000 kg/day. Complementary products include the WATROMAT Belt Dryer (WB) for pre-dewatered sludge above 20% DS, container dryers (WTC for small volumes from chamber filter presses, WGM roll-off format for 3-9 t/day evaporation), skip dryers (WSK and WTM for filter cake at 30%+ DS with 1.2-2.4 t/day evaporation), and bunker dryers for continuous medium-to-large volumes from 5 to 35 m3. Each system ships with polymer dosing units, mixing and flocculation tanks, screw and belt conveyors, and Siemens S7-1512 PLC control cabinets with ET200SP I/O and KTP700 touch panels, providing complete turnkey sludge treatment plants from a single manufacturer.
Key Products
Integrated screw press and belt dryer system processing sludge from 2% DS inlet to 90% DS outlet at 30°C, consuming only 0.33 kWh/kg water separated, available in ten models from 0.5 to 12 t/day DS capacity.
Standalone sludge dewatering press using a conical screw shaft with pneumatic counter-pressure cone, processing 0.5-8% DS inlet to 20-35% DS outlet, in seven models from 500 to 15,000 kg/day DS.
Low-temperature belt dryer for pre-dewatered sludge (≥20% DS), achieving up to 90% DS output at 40°C with 333 W/kg H₂O energy consumption, available in single and double-deck configurations from 0.1 to 24 t/day evaporation.
Compact container dryer for filter cake from chamber filter presses (≥25% DS inlet), using low-temperature drying for small to medium sludge volumes.
Large-capacity container dryer with 3-9 t/day water evaporation capacity, designed for roll-off container formats for higher-volume sludge drying applications.
Compact skip dryers for filter cake (≥30% DS inlet) with 1.2-2.4 t/day evaporation capacity (WTM) or smaller volumes (WSK), suitable for small industrial wastewater treatment plants.
Low-temperature sludge dryer for material ≥20% DS, with screw conveyor feeding and volumes from 5 to 35 m³, for continuous drying of medium to large sludge volumes.
Liquid and powder polymer preparation and dosing systems for sludge conditioning prior to dewatering, integrated with Watropur screw press and press-dryer plants.
Screw conveyors, belt conveyors, mixing/flocculation tanks, pumps, flow meters, insulated polyurethane panels, bagging units, and silos — complete plant accessories for integrated sludge handling.
PLC-based control systems using Siemens S7-1512 with ET200SP I/O, Profinet bus, and KTP700 touch panels for automated operation and monitoring of Watropur sludge treatment plants.
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