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.
The design of the Rotoshifter allows compost cleaning based on both density and size through combining an airstream with rotary movement. This way the light compost material is separated even from other light materials such as foil and purity is increased.
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.