| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus for dewatering sludge which enables flocculated sludge to be formed into a dewatered cake at high efficiency without being finely grained when supplied to a filter cylinder. SOLUTION: In the apparatus A for dewatering the sludge, the sludge and a flocculating agent are mixed under stirring in a flocculation reactor 5 to form the flocculated sludge. The flocculated sludge is supplied into a filter cylinder 71 of a vertical type screw press 7 through a receiving port 76 provided on the lower part of the filter cylinder 71, and is dewatered by squeezing, while being conveyed upward in the filter cylinder 71 by the rotation of a screw 72 disposed in the filter cylinder 71. The flocculation reactor 5 is disposed above the receiving port 76. A supply pipe 6 is provided for supplying the flocculated sludge from the flocculation reactor 5 to the receiving port 76. The flocculated sludge is supplied into the filter cylinder 71 under pressure, while a state, where the flocculated sludge is accumulated in the supply pipe 6, is maintained. COPYRIGHT: (C)2009,JPO&INPIT
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