The Bio/Shredder type Bio 100 it can be supplied with petrol or electric engine. The grinding system is composed by two parts: the first one named chipper is used to cut wooden or fibrous products as wood, linden tree, willow etc.; the second one, by means of little hammers, triturates products like leaves, hedges, mould, waste of kitchen: a good operation is granted even if pebbles or nails have been introduced accidentally. The fineness of the ground material can be adjusted through a sieve by request. The natural transformation of the biologic triturated material originates a substance having a high proteinic value which is used as manure.