Drum screw filter

FSS

CATEGORY SEWAGE
TYPOLOGY COARSE SCREENS

WHEN TO USE IT

The FSS-type drum screw filter is suitable for many applications, in particular in the macro-screening of suspended materials in civil and/or industrial sewage wastewater.

HOW IT IS MADE

The FSS filter consists of: a multifunctional screw, a cylindrical filtering screen with suitable free openings, a screen cleaning system, a screened material transport and compaction system and a sturdy gearmotor. The screen is made up of bars that are wrapped around the circumference, cleaned by a suitable rotating comb.

HOW IT WORKS

The water to be filtered passes through the filtering screen depositing material larger than the free opening on the wedge wire bars. Most of the time, therefore, the machine has no moving parts; only when the difference in height between the upstream and downstream of the screen reaches the threshold value the gearmotor activates the movement of the comb and the screw. The teeth of the comb clean the screen by depositing the screened material on the central screw, with a diameter smaller than the screen. The screw provides for the removal, lifting, compacting and discharging of the screened material. This last phase allows a compaction and drying equal to more than 60% of its initial weight to be obtained, before the screened material is bagged or discharged into a suitable container.