| 摘要 |
a sewage/waste water disposal tub(1) filled with sewage and waste water; a driving shaft(3) that is rotatably mounted on both supports(2) of the sewage/waste water disposal tub(1); and a rotation member(4) that is rotated along with the driving shaft(3), to supply oxygen for the microorganism. The rotation member(4) is installed at the driving shaft(3), wound with plate-shaped media.
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