By B. Jackson, R. Schroeder, and S. Ashton
Shredders are slow-speed rip/shear devices, used widely in tire shredding. Material is pinched between rotating devices and ripped apart or sheared. Shredders are used where significant contamination is evident because the internal parts are slow moving. Damage due to metal, rock, or concrete is avoided. They are not widely used in woody biomass operations because their capital cost is high and the particle size is larger and less uniform in size than what can be achieved with a chipper. Material from shredders usually requires further size reduction.