SLUDGE SCRAPING DEVICE

摘要

PROBLEM TO BE SOLVED: To enable a rapid countermeasure and an efficient operation even in the case where an amount of sludge flowing-in is temporarily increased rapidly. SOLUTION: In the sludge scraping device, an underwater truck 14 provided with a scraping plate 16 is reciprocally moved repeatedly and the sludge deposited at a bottom surface 20 of a sedimentation pond 10 is scraped by the scraping plate 16. A movement step of the underwater truck 14 is divided to a plurality of operation patterns and is previously set. The operation pattern is selected based on the amount of sludge in flowing-in water 22 detected by a detecting means 40 to move the underwater truck 14.