There is no difference between a trommel and a rotary screen. It is a piece of equipment that consists of a rotating drum that sifts the material. Depending on the selected drum mesh, it will be possible to sort different materials and/or screen a single material to a finer particle size.
These machines can process many materials depending on the needs, for example: earth, stones, compost, green waste, mulch, construction waste, demolition, quarry, wood chips, aggregates, etc.
If you want to shine in society, the word "trommel" means drum in German (a word gradually passed into common technical language). A rotary screen is neither more nor less than a sifting drum.
