| 摘要 |
<p>A biological waste water purification plant has at least one trickling filter 4 provided between an upper waste water distributor 14 and a lower collecting trough 15, which trickling filter has a water-permeable filter layer 5, 6 which takes up microorganisms. In order to be able to ensure reliable oxygen supply to these microorganisms, a baffle layer 7, which alternately blocks or releases the water throughflow, is arranged downstream of the filter layer 5, 6.</p> |
