The bio-shredder type Bio 55 comes in either petrol or electric engine versions. The shredding system consists of a blade for rough cutting and moving hammers for fine shredding. The new system with belt transmission grants safety in case that unsuitable materials, such as stones, are introduced. The fineness of the final output can be adjusted by way of a sieve. The output is released into a gathering sack placed at the discharge opening. The shredded organic material is naturally transformed into a high-protein organic substance, that can be used as a fertiliser.