1. The wastewater enter the drum screen from the inside rotating drum. The larger than screen mesh solids are captured on the filter screen and Water passes through the screen.
2. When the solids accumulate to a certain amount inside drum and the water level up to the high level, the water level auto-control system starts working, rinse pump and drive motor start working , and use nozzle high pressure water jet washing strainer and the solids wash down into the tray then flow out
3. When the mesh is clean and the water level down to the low level, rinse pump and drive motor stop working, and drum filter will start the new working recycle.