| 摘要 |
<p>PURPOSE:To efficiently circulate the eutrophicated water by connecting a riser with the lower end opened to an annular float having a bell-mouthed discharge port at the center of the upper surface and providing a blowoff port at the center of the lower opening of the riser. CONSTITUTION:This aeration device is moored at a specified depth by plural mooring ropes 5a. An annular float 1 with a bell-mouthed discharge port 1a formed at the center of the upper surface is provided, and the upper end of a riser 2 with the lower end opened is connected to the lower end of the discharge port 1a. A projecting circular blowoff port 3 having many blowoff tiny holes 3a is provided at the center of the lower opening of the riser 2. A suction pipe 4 is connected to the blowoff port 3, and compressed air is injected in all directions from the tiny holes 3a. The low water is forcedly circulated to the surface layer by the ascending motion of the compressed air in the riser 2, the COD in water is improved, and purification of water by the oxidative decomposition is promoted.</p> |
