| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a water cleaning facility which can effectively clean water while establishing an environment suitable for growth of underwater creatures. SOLUTION: The floating islands 11 to 13 of the water cleaning system hold contact members where underwater microorganisms, animal planktons or the like which clean the water live, and propeller type water flow devices 14 to 16 generate water flows directed to the contact members held by the floating islands 11 to 13.</p> |
