... Easy to Operate 3. Large drive torque and energy saving Bridge Sludge Scraper and Suction Equipment This kind of sludge scraper ... kind of sludge scraper consists of drive, scum launder, accessory bridge, rake skimmer, scum scraper, scum baffles, sludge scraper, effluent ... bearing seat and influent well. 2. As the accessory bridge rotates, the scraper thereunder scrapes the sludge along the inclined ...