| 摘要 |
<p>PURPOSE:To discharge only supernatant water by raising a weir above the water surface when sewage is aerated to prevent the outflow of sewage and lowering the weir after aeration. CONSTITUTION:Supernatant water is discharged by means of the weir 4 for the supernatant water provided on a float 1 floating on sewage and a water pipe connected to the weir 4. A lift 7 is furnished to the float to raise the weir 4 on the water surface. Consequently, sewage is not discharged during aeration, the supernatant water is discharged after aeration by lowering the weir, and a stabilized water quality is maintained.</p> |
