| 摘要 |
PROBLEM TO BE SOLVED: To separate precipitates from a treated liquid and also to selectively recover the precipitates by specific gravity and particle diameter. SOLUTION: This device centrifuges a treated water to separate into a supernatant and a precipitate by rolling a separating drum 1 and discharging the supernatant by overflowing the separated supernatant from an opening part. In this case, a spiral dam 10 is equipped at a surface of inner wall extended sprirally from the bottom to the opening, thereby enabling the precipitate to separate up and down into multi stages along the spiral dam 10 by specific gravity and particle diameter of the precipitate.
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