Even with proper kitchen and garden waste collection, impurities in compost are never completely avoided. The Rotoshifter combines two separating techniques to achieve pure compost in an energy efficient way: wind shifting and drum screening. This results in a two stage separation process. In the first stage, air separation is used for complete separation of various light materials. Secondly, screen separation provides separation based on size.
To separate the compost from the other waste streams, the material is fed through the top of the Rotoshifter. Here, it is first sorted through both air and rotational forces and sieved by size. The resulting fractions depend on the settings of the machine as they are entirely customizable to your waste stream.