Sludge dewatering treatment method and sludge dewatering treatment system

摘要

PROBLEM TO BE SOLVED: To provide a sludge dehydration treatment method capable of reducing initial cost and running cost and further capable of swiftly performing the dehydration treatment of sludge.SOLUTION: Provided is a sludge dehydration treatment method where primarily sedimented sludge 19 obtained by subjecting the water 11 to be treated containing fibrous material to gravitational sedimentation in a final sedimentation tank 31 and surplus sludge 21 obtained by subjecting the same to gravitational sedimentation in a final sedimentation tank 35 are mixed into mixed sludge 23; thereafter, the mixed sludge 23 is subjected to dehydration treatment by a dehydration machine 67. The primarily sedimented sludge 19 and the surplus sludge 21 are mixed so that the content of the fibrous material in the mixed sludge 23 reaches 20% or higher.SELECTED DRAWING: Figure 1