| 摘要 |
<p>PURPOSE:To obtain a drainage treatment device with high purification efficiency and low running cost by making fouled water holding time in a water tank and air bubble contact time in water longer and making the air bubble fine and dispersing it to enhance the useful utilization efficiency of oxygen in the air thus supplied. CONSTITUTION:A water drainage square framing (a4) is attached to a tower water tank (a), both communicating with each other at the bottom of a side wall. At the same time, a dispersion pipe 5 for air release is installed at the bottom surface (a4) of the water tank. Further, a zigzag passage is formed by providing layers of a partition 6 alternately from both right and left side walls with the one end open. Next, the space formed in section by each partition 6 is filled with numerous bearers (c) and a cleaning pipe 9 for cleaning the bearer (c) is installed at the lower surface of the partition 6.</p> |
