Doppstadt Shredders and Trommels: German Engineering for Waste Processing
Doppstadt: Slow-Speed Shredding Specialists
Doppstadt is a German manufacturer specializing in slow-speed shredders and trommel screens for waste processing, recycling, and biomass preparation. Where horizontal grinders like Bandit and Morbark use high-speed impact to reduce material, Doppstadt shredders use slow-speed, high-torque shafts to tear material apart — a fundamentally different approach with distinct advantages.
Slow-Speed Shredders
| Model | Type | Drive | Throughput | New Price | Used Price |
|---|---|---|---|---|---|
| DW 2060 | Single-shaft | Diesel-electric | 30 – 80 TPH | $350,000 – $475,000 | $125,000 – $275,000 |
| DW 3060 | Single-shaft | Diesel-electric | 50 – 120 TPH | $475,000 – $625,000 | $200,000 – $400,000 |
| DZ 750 | Dual-shaft | Diesel-electric | 30 – 100 TPH | $500,000 – $700,000 | $225,000 – $450,000 |
Why Slow-Speed Shredding?
- Handles contaminated material — Slow-speed shredders can process material with metal, wire, rebar, and other contaminants that would destroy a high-speed grinder. The shafts simply push through or reverse.
- Lower dust generation — The tearing action creates far less dust than high-speed impact grinding. Fewer air quality concerns.
- Lower noise — Operating at 70-80 dB vs. 95-110 dB for horizontal grinders. Better for urban sites.
- Lower fuel consumption — Electric drive and slow operation mean 40-60% less fuel than a horizontal grinder at equivalent throughput.
- Consistent output — Screen baskets control output size precisely. No fines or dust generation from over-processing.
Trommel Screens
| Model | Drum Size | Throughput | New Price | Used Price |
|---|---|---|---|---|
| SM 518 | 5' x 18' | 80 – 200 TPH | $275,000 – $375,000 | $100,000 – $225,000 |
| SM 620 | 6.5' x 20' | 120 – 300 TPH | $350,000 – $475,000 | $150,000 – $300,000 |
| SM 720 | 7' x 20' | 150 – 400 TPH | $425,000 �� $575,000 | $200,000 – $375,000 |
Best Applications for Doppstadt
- MSW (municipal solid waste) processing — The dual-shaft shredders handle mixed waste including plastics, metals, and organics
- C&D recycling — Mixed construction debris with rebar, wire, and varying material types
- Biomass preparation — Shredding wood waste to consistent chip size for boiler fuel
- Compost facility pre-processing — Shredding incoming feedstock before windrow formation
- Tire and rubber recycling — The DZ dual-shaft models can process whole tires
Doppstadt vs. Horizontal Grinders
If you're processing clean wood (land clearing, pallets, logs), a horizontal grinder (Bandit, Morbark, CBI) is faster and cheaper per ton. If you're processing contaminated, mixed, or variable material, Doppstadt's slow-speed approach avoids the catastrophic damage that contaminants cause in high-speed grinders. Many operations use both — a Doppstadt shredder for pre-processing, followed by a horizontal grinder for final sizing.
