The STEPSEP step screen, STS series, are installed in channels. They fulfill the fine screening function at the inlet of a sewage treatment plant (mesh from 3 to 6 mm). In addition, they can be equipped with a fully integrated compactor for screenings dewatering (STS/P series).

The effluent passes through the screen and deposits the suspended matter on the filter screen constituted by vertical lamellas made of stair-shaped cutted stainlesssteel sheets.

The screen start-up is programmed periodically, and by loss of head measurement caused by the accumulation of waste on the immerged part of the screen.

The recovery of waste on top of the unit is carried out by the rotating movement of the lamellas.

›FRAME

The structure of the screen is made up of two lateral frame structures fitting the required channel width. For channel installation, lateral rubber bands are sealing the gap between screen and civil-work. Different widths and discharge heights are available to accommodate a wide variety of configurations.

›FILTRATION SCREEN

The screen consists of fixed lamellas and movable lamellas mounted alternately. The moving lamellas describe a circular motion. Thus, their relative movement, with respect to the fixed blades, has the effect of raising the waste step by step to the top of the unit before discharge.

›MECANISM

The circular movement of the movable assembly is generated by means of transmission arms connected to eccentric wheels. The assembly is driven by a geared motor mounted on the main driving shaft.

›WASTE

The screening waste can thus be unloaded in a container. They can be also transferred to a conveyor or a transversal screw compactor integrated to the unit (Version STS/P).