The BIOGEST® Storm Screen Type SAS is installed at the overflow weir before the weir. It consists of a perforated semicircle filtering basket, with holes of 6 mm diameter, a rotating screw conveyor and a zone of calm for the discharge of the collected screenings. It is kept clean by a rotating screw conveyor and the screened water can be release toward the forwarding water flow.
The screen is controlled by a level measurement installed before the weir. As the water level rises to a critical overflow point the screw conveyor starts to rotate. It keeps the holes clean from any debris and transports the screening debris in axial direction toward the discharge zone. The gear motor placed at one end of the machine is compact in size and is sized based on the length and diameter of the machine.