| 摘要 |
<p>An activated sludge plant for sewage has aeration tanks with a length-to dia. ratio of at least 20/Pe, where Pe, the Pellet index, is v.d/D where v is the sewage velocity, d the dia. and D is the dispersion coefficient; the value of Pe should lie between 0.1 and 10. The aeration tanks have additional fitments by which the air press. above the sewage can be increased above ambient.</p> |
