| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a water cleaning apparatus having the enhanced efficiency for supplying oxygen to a targeted lower layer water region having a lower dissolved oxygen concentration by transferring surface layer water to the lower layer water region without generating vertical mixing, preventing air bubbles immediately rising from a diffusing apparatus as usual bubbles and imparting a bubble slow releasing function. SOLUTION: The water cleaning apparatus is provided with a stand 10 disposed on the surface of the water, air sources 4 and 5 disposed on the stand 10, a strut 1 extending to the lower side from the surface of the water and fixed to the stand, a piping tube 6 for introducing air through the inner part of the strut and communicating with the air sources, a diffusing tube 8 for aerating the air at a part near to the lower end part of the strut and blades 2a and 2b each fixed freely movably along the strut above the diffusion pipe, having a projecting shape to the upper side and capable of holding the air in its inner part.</p> |
