... drive torque and energy saving Bridge Sludge Scraper and Suction Equipment This kind of sludge scraper is mainly used for large ... 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 ...