It is used in settling ponds of medium and large scale wastewater treatment systems. The purpose of settling ponds is to precipitate chemical or biological sludge in biological or chemically treated wastewater and to obtain clarified water. During this clarification process, the sludge settling on the bottom of the pool must be removed from the system. Due to the fact that the mud forms a wide cover on the bottom of the pool, there is a need to draw the mud from certain points. That's why scrapers are used. Rotating Bridge Scrapers are suitable for use in circular settling ponds. Thanks to the scraper pallets at the bottom of the Rotary Bridge Scrapers, the sludge accumulating at the bottom is directed towards the mud receiving compartments. At the same time, the foam and oil accumulated on the surface of the settling pool are directed to the oil-foam collection compartments by the scraper pallets.