Drum screen is a device designed as a unit made of metal sheet with a rotating drum of a wedge-shaped profile bars, a knife for removing detained pollution, screen cleaning systems, gear motor.
Sewage water is fed to the surface of the drum and is filtered through the gaps between the bars, leaving solids on them. Detained substances are removed with a knife when the drum rotates and dumped into a special container.
The main advantage is trapping impurities larger than 0.25 mm.
Drum screens are used in wastewater treatment plants for sewage straining in food, textile, leather and petrochemical industries.