| 摘要 |
<p>1. Process for the biological purification of waste water by contacting a sludge/water mixture in an activating vessel having a height of from 10 to 30 m, to which waste water, activated sludge and air are fed continuously and from which an equivalent quantity of sludge/water mixture is withdrawn, which comprises guiding the sludge/water mixture and the air in at least one loop-shaped flow and adding to the sludge/water mixture substances having a particle size of from 0.001 ot 10 mm and a surface of from 100 to 1.500 m**2/g in an amount of from 10 to 1.000 g/m**3, relative to the waste water fed in.</p> |
