Trommel screens are used in any type or sifting or separation work. As material passes through the screened cylinder, the smaller particles pass through the openings, while the larger pieces are kept inside, thus separating the material by size. They are used for a variety of applications, including the separation of sand/gravel, lumber mill by-products and municipal solid waste (MSW) and in compost production. At an MRF, the screens are used to separate the biodegradable fraction of mixed MSW and separate smaller debris such as broken glass from larger recyclables, making them a practical addition to any Tuffman® sorting station.
Trommel screens are also useful in excavation sifting. They can separate the debris into topsoil to be sold to farms, nurseries and site-work, and rock that can be cleaned and used for aggregates and landscaping, allowing a contractor to reuse or resell waste rather than paying transportation and disposal fees.