The screenings to be treated are directly discharged from a screen or conveyor (e.g. a screw conveyor) into the feed trough of the Wash Press. A robust conveying and compacting screw then transports the screenings into the wash zone. Here, the screenings are subjected to intense and directed turbulence generated by the automatic introduction of wash water (service water), ensuring effective washing and dewatering of the solids.
The turbulence created in the wash zone ensures the perfect separation of organic particles, resulting in highly effective screenings washing. Both the washing intensity and the number of wash cycles are individually adjustable, allowing for optimal customization based on specific treatment needs.
The washed screenings are then conveyed through the rising pipe to the press zone, where they are dewatered by the compacting screw. This process effectively presses the screenings to achieve a dry solids (DS) content of 35-45%, significantly reducing their volume and weight.
The wash water generated during screenings compaction, which is rich in carbon, is discharged back into the wastewater stream. Additionally, the system features automatic cleaning of the wash water collecting tank beneath the machine, ensuring continuous operation and preventing the buildup of contaminants.
The washed and compacted screenings are finally transported through the conical discharge pipe into a skip for easy disposal. To optimize maintenance, machine sizes 2-12 are equipped with wear detection for the compacting screw in the press zone. This system automatically identifies the ideal time for auger maintenance, helping to prevent unexpected breakdowns and ensuring efficient operation.
