| 摘要 |
1. An aftercleaning system for waste water which has been pre-treated in separators for light liquids comprising several layers (8, 8', 8") of coalescent and/or adsorbent filter material stacked within a tank (3) showing essentially a vertical flow direction characterized in that each layer (8, 8', 8") is provided at least with one support-pipe (11, 11', 11") and that the support-pipes (11, 11') of the upper layers (8, 8') are placed onto the support-pipes (11', 11") of the lower layers (8', 8"). |
