| 摘要 |
<p>PURPOSE:To ensure an effective purification of water at the bottom by conducting water filtered by a filtering device buried at the bottom and fine bubbles formed by sending air to the lower part of a pumping-up cylinder which is afloat in a reservoir and causing the water mixed with air to overflow from the top of the pumping-up cylinder. CONSTITUTION:Cylindrical filtering devices 2 are buried side by side at a certain interval in a groove dug out at the bottom 1 where organic matters accumulate, and an outlet for filtered water of the filtering device 2 is allowed to communicate with a water collection pipe 3. A reservoir 4 with an opening on the upper surface is buried in the bottom, adjacent to the filtering device 2. After that, the lower end of a pumping-up cylinder 5 is introduced into the reservoir 4 and the lower end is positioned below the water collection pipe 3. At the same time, a float 6 is fixed to the upper part of the pumping-up cylinder 5 and the opening of the upper surface of the pumping-up pipe 5 is positioned constantly above the water level. In addition, the water collection outlet of the water collection pipe 3 is allowed to communicate with the lower part of the pumping-up cylinder 5 through a flexible tube 7. At the same time, one end of an air pipe 8 with many air diffusion holes is provided as an opening on the lower part of the pumping-up cylinder 5, while the other end of the air pipe 8 is connected to a blower for sending air above the water level.</p> |
