| 摘要 |
<p>PURPOSE:To prevent bubbles from mixing into descharge water and the water quality from deteriorating by partitioning the aeration pipe and the discharge pipe of an aeration tank with a flow circulating plate having a defoaming container at the upper portion to effectively perform defoaming. CONSTITUTION:Flow circulating plate 2 having container 3 holding defoaming agent 4 at the upper portion protruded from the water surface is placed between aeration pipe 6 and discharge pipe 7 in aeration chamber 1 of a sanitary sewage purifying tank. Bubbles 5 formed by aerating sanitary sewage rise, contact to defoaming agent 4 in container 3, and disappear. Thus, the water surface is not covered with bubbles, and no bubbles go over plate 2 and mix into treated water when bubbles burst, preventing the quality of treated water from deteriorating.</p> |
