| 摘要 |
<p>A waterwheel system for the economical aeration or cooling of water in sewage treatment tanks and fishponds, in which an aerator waterwheel (1) including a plurality of porous tubes (2a) encircling and fixed to a rotary shaft (3) in parallel therewith by means of disks (4) is disposed near the water surface of a water tank (10) so that the tubes situated at the bottom are immersed in the water, and the waterwheel is rotated at such a slow speed that heavy splashing will not be produced by the waterwheel. <IMAGE></p> |
