| 摘要 |
PROBLEM TO BE SOLVED: To provide the draining device of a hopper capable of allowing a sewage component in stored sludge to flow out by a simple device to drain the same and capable of performing drainage during storage. SOLUTION: Drainage holes 3 are formed to the outer peripheral surface of a temporay storage hopper of sludge and a drainage pipe 3 for draining water to the outside of the hopper is vertically arranged in the hopper main body 1.
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