The bioshredder model BIO 55 is equipped with petrol and electric engine. The shredding system consists of a blade for rough cutting material and of moving hammers for fine shredding. The new system with belt transmission grants safety in case unsuitable materials as stones are introduced. The final output, which can also be adjusted thanks to a mobile screen, is released into a gathering sack placed at the discharge opening. The shredded organic material is transformed naturally into a substance rich in protein that can be reused as a fertilizer.