Comparison
Straw Shredder vs Hammer Mill: Which Machine Lowers Your Feedstock Prep Cost
Straw shredder or hammer mill? Compare energy use, particle size, throughput and maintenance to find the lower-cost way to prepare straw feedstock.
Review a reported straw-machine energy comparison with evidence limits: 18.7 versus 12.3 kWh per ton is about 34%, not a guaranteed saving or bedding-health result.
When you run a mixed grain farm, straw management is year-round work. Some gets baled for bedding, some goes to the biomass boiler, and the rest needs to be chopped for field incorporation. The question is which machine does it cheapest.
A farm in the Mekong Delta ran a side-by-side comparison over three months: their existing hammer mill versus the WDS1865 straw shredder. Both machines processed identical material — dry rice straw at 12% moisture.
Energy Cost Per Ton
The prior narrative reports 18.7 kWh per ton of finished material for the hammer mill and 12.3 kWh per ton for the WDS1865. The arithmetic difference is 6.4 kWh per ton, about 34% relative to 18.7. The claimed 1865mm rotor and material-specific explanation are part of that account, not a verified cause of the difference. Confirm actual equipment configuration and compare complete lines at the same moisture and accepted product requirement.
Output Quality for Animal Bedding
The narrative reports 22% fines below 2mm from the hammer mill and 8% from the straw shredder, with an approximately 40% improvement in bedding absorption. Without sampling and absorption-test methods, those figures remain unverified reported results. A fines percentage alone does not establish a respiratory outcome or animal-health benefit. Confirm the bedding acceptance criteria and dust controls for the actual use rather than infer a universal benefit from this account.
See our full straw shredder lineup for both diesel and electric configurations.
Why a two-stage line may be more stable
Long straw can bridge a fine hammer-mill inlet and create an inconsistent load. A coarse shredder can open bales and shorten the material before the finer reduction stage. That does not mean two machines are always cheaper: compare the complete line at the same moisture and finished-particle requirement. Record energy, wear parts, productive time, blockages and accepted output.
Information needed for selection
- Bale type, dimensions, binding material and hourly feeding method.
- Straw species, moisture and soil contamination.
- Final use, screen requirement and downstream conveyor or storage.
- Required mass per hour and daily duty cycle.
