| 摘要 |
PROBLEM TO BE SOLVED: To provide a sludge dehydrator which can effectively use separated liquid, separated by a first dehydration part, in a sludge dehydration process. SOLUTION: The sludge dehydrator comprises the first dehydration part 3 and a second dehydration part 4 for further dehydrating sludge dehydrated in the first dehydration part 3, and the separated liquid W separated in the first dehydration part 3 is supplied onto a water-permeable filtration chamber 12 of the second dehydration part 4. Thereby the outer surface of the water-permeable filtration chamber 12 is always washed with the separated liquid W during dehydration operation to prevent the clogging and the like of the water-permeable filtration chamber 12. Preferably a water-permeable filtration chamber 6 of the first dehydration part 3 is disposed just above the water-permeable filtration chamber 12 of the second dehydration part 4, which dispenses with a special means for supplying the separated liquid W to the second dehydration part 4, and enables the saving of an installation area for the whole sludge dehydrator. COPYRIGHT: (C)2005,JPO&NCIPI
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