Left chopped-up branches and tops. Right this type of raw material has been subjected to torrefaction before being ground into a fine-grained mass, which is then pressed into pellets. This contains about 70 per cent of the original
Left chopped-up branches and tops. Right this type of raw material has been subjected to torrefaction before being ground into a fine-grained mass, which is then pressed into pellets. This contains about 70 per cent of the original