| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus for concentrating sludge which enables a stable operation even if a raw sludge concentration is fluctuated, and is capable of obtaining concentrated sludge having a small change in concentration and a high concentration. SOLUTION: The apparatus for concentrating the sludge 1 comprises rotatably housing a spiral screw 9 inside a filter cylinder 8, while transporting the sludge introduced from a sludge flocculation tank 2 into the filter cylinder 8 by rotationally driving the spiral screw 9, making a water content contained in the sludge pass through the filter surface 8a of the filter cylinder 8 to discharge it outside as a separated liquid and concentrating the sludge, and also discharging the concentrated sludge from the inside of the filter cylinder 8, wherein a sludge introduction port for introducing flocculated sludge is provided on the lower part of the filter cylinder 8, and wherein a screw conveyer 14 for discharging the concentrated sludge is provided on the upside of the filter cylinder 8 such that a discharge amount is increased with a rise in interface of the concentrated sludge in the filter cylinder 8. COPYRIGHT: (C)2007,JPO&INPIT
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