The media to be separated find their way through the inlet opening (1) into the vessel-like Bioselect. The outer cylinder is separated from the auger (3) by a roundly sealed wire-wound screen pipe (2). The auger has a frictional connection to the drive. The imported liquid flows into the screen area next to the drive. The liquid flows through the wedge wire screen (2) into the outer vessel area. The liquid drains through the liquid outlet (4).
The solid contents remain on the screen surface. They are conveyed into the press channel (5) by the rotating auger (3). Powerful subsequent dewatering takes place in the press channel (5). The rotating auger has a Multi Disc (6) (sealing disk), which can be shifted in axial direction, at the non-drive end. The adjusting unit (7) presses the Multi Disc against the auger and the compressed thick matter plug. When the thrust force of the plug is greater than the spring force of the Easy Shift unit (7), a slot for discharging is created by axial movement. A scraper edge is used to loosen and expel the solids.
Liquid penetration is impossible due to the Multi Disc technology (6). The Multi Disc (6) seals the press channel (5) as long as the required drying stage of the thick matter plug is achieved. This is when the slot for discharging opens and the solid phase is loosened and expelled – penetration-proof technology.
Fibers are caught in the profile groove of the auger (3). The fibers function as a sealing brush. Metallic rubbing between the auger and the wedge wire screen (2) is avoided by the brush. This unique technology increases the service life of the wedge wire screen (2) and auger many times over. In addition, the brushing surface cleans the wedge wire screen very thoroughly. Additional cleaning by the operator is not necessary.