A trommel is a slow rotating separation equipment used to remove small contaminants from a recycling stream. Although slow moving, this robust piece of equipment has been proven effective in numerous applications and is often used in municipal waste separation in large Material Recovery Facilities (MRF).
At the core of a trommel is a large cylindrical mesh screen tunnel that rotates between 6 – 10 rotations per minute. Flaps are mounted on this interior tunnel to continuously flip the feed stock as well as guiding it in a forward motion. As the feed stock slowly moves through this large piece of separation equipment which tilted at an angle, small pieces of unwanted contamination such as broken glass falls through the mesh screen and is collected. Pieces that are larger than the mesh screen holes moves forward to the next piece of recycling machinery.