| 摘要 |
<p>A purifying plant for sewage according to the active sludge method comprising an open tank provided with a partition and having the shape of a closed aerating circuit with a supply conduit, a discharge conduit and at least one surface aerator, said aerating circuit having a curved shape such that it substantially encloses a space in which at least one after-settling tank and at least one thickening pond are provided.</p> |
