Trommel screens have a rotating drum on a shallow angle with screen panels around the diameter of the drum.
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Trommel screens are used by the municipal waste industry in the screening process to classify sizes of solid waste.
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One of the available designs of trommel screens is concentric screens with the coarsest screen located at the innermost section.
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Trommel screens are also more susceptible to plugging and blinding, especially when different sized screen apertures are in series.
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Depending on desired application of trommel screen, a balance has to be made between the screening efficiency and production rate.
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Larger granules will be retained inside the trommel screen until the desired aperture is met and follows the same particle behaviour.
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In the wastewater treatment industry, the solids that exit the trommel will be compressed and dewatered as they travel along the conveyor.
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Trommel screens can be used in a variety of applications such as classification of solid waste and recovery of valuable minerals from raw materials.
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A pipe was suspended within the trommel, carrying water upwards to spray the incoming material, cleaning it and breaking up larger lumps.
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A smaller trommel then allows the biodegraded soil fraction to pass through leaving non-biodegradable, recyclable materials on the screen to be collected.
