... . Large drive torque and energy saving Bridge Sludge Scraper and Suction Equipment This kind of sludge scraper is mainly used for ... located on the tank periphery. Configuration and Principle: 1. This kind of sludge scraper consists of drive, scum launder, ... accessory bridge, rake skimmer, scum scraper, scum baffles, sludge scraper, effluent weir, central bearing seat and influent well. 2. As the ...