| 摘要 |
<p>PURPOSE:To provide an oxygen ditch capable of performing efficient aeration treatment while keeping a high oxygen supply amt. CONSTITUTION:In an oxidation ditch wherein an aeration stirrer 3 is arranged in a ditch 1 having an oval endless water channel 2, a buffle plate 8 making the surface flow velocity of water to be treated almost zero is provided on the upstreama side of the aeration stirrer 3.</p> |
