Solid-liquid separation method of dredging sludge, dewatering method of dredging liquid sludge, and treatment method of dredging sludge

摘要

PURPOSE:To enhance dredging sludge treatment efficiency by a method wherein dredging sludge is discharged on an openable/closable draining board to be subjected to solid-liquid separation and the remaining solid sludge is allowed to fall by opening the draining board to classify the destination thereof by the operation of a partition plate. CONSTITUTION:When the sludge dredged by a hermetically closing type bucket 3 is discharged on the draining board 4 fixed to a rotary shaft 8, solid sludge remains on the draining board 4 while liquid sludge flows down to be passed through a liquid sludge passage 15, a tank 21 and dehydration devices 22, 36 by a partitioning plate 14 and returned to a dredging water area while solid sludge is further separated. The solid sludge remaining on the draining board 4 falls from the draining board 4 by rotating the rotary shaft 8 and enters a discharge conveyor 20 by changing over the partitioning plate 14 to be discharged into the hatch of a dredging ship 1 along with the solid sludges from the dehydration devices 22, 36. By this method, the treatment efficiency of dredging sludge can be enhanced.