| 摘要 |
Sludge supply tank(4) is installed with a height adjustable screw(7) inside and both ends of this screw axis are connected by being inserted to a hole pierced in the middle of a separate bracket(11), which is connected to sludge supply tank as being inserted to a long hole pierced at the side part of sludge supply tank and by up and down position change of bracket, height of screw is adjusted. With the center part as a reference point, blade part(7b) of screw are formed facing opposite directions to each other and adjusts sludge height that lays on lower filtrating material.
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