Model DSS -Screw-Screen

Screw-screens are integrated machines consisting of a screen, a shaft-less spiral and an compaction unit. During operation, solids within the incoming flow will progressively collect onto the screen mesh and cause it to gradually blind. The upstream water level will rise and at a predetermined level, the spiral will be activated. Brushes fixed to the periphery at the lower section of the spiral will then clean the screen mesh and convey the solids up to the compaction zone.