| 摘要 |
PURPOSE: To provide a natural water system water-purifying structure capable of purifying water in a state near a natural state without disposing a complicated water-floating installation and excellent in maintenance by disposing an anchor means on the bottom of the natural system and fixing a filtration material to the anchor means to float the filtration material in the water. CONSTITUTION: An anchor means such as a natural stone 11 is disposed on the bottom or wall of a natural system, and the end of a rope fixed to the anchor means is fixed to floating units 16, 17. A filtration material comprising at least either of carbon fibers and vegetable fibers 15 is disposed on the floating units 16, 17. |
