| 摘要 |
An ultraviolet-ray irradiation apparatus for sterilization of a liquid or sludgy substance to be sterilized. The apparatus includes a double-wall ultraviolet-emission tube having an outer tube and a transparent, hollow inner tube permitting passage of ultraviolet rays. A static mixer is disposed within the hollow inner tube. A feeding unit causes the liquid or sludgy substance to be sterilized to pass through the inner tube. This structure enable uniform sterilization of the liquid or sludgy substance by ultraviolet rays.
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