Comminution plants type NZ-RS from Höcker Polytechnik comminutes and crushes coarsley shaped and bulky wooden chips and shavings. After that the material can be transported without problems and space savingly stocked or be compacted to briquetts. Different sized steel strainers define the grain size of the wood chips. The downstream chipper NZ can be fitted below the bunker discharge with conveyor belt or rotary valve feeding. Further more the downstream chipper is suitable for the shredding of peeled bark, for the processing of mulch and compost.