Final sedimentation tank at sewage treatment works
Numéro d’image : 11900298
| Final sedimentation tank at a sewage treatment works,with the pumping station in the background. Incoming raw sewage is first pumped to a comminuter which shreds the larger solid material. It then flows into the primary sedimentation tanks,where 85% of the solids are removed,& then into the biological treatment units,where micro- organisms break down and remove fine organic material & dissolved pollutants. The sewage then passes to the final sedimentation tanks (humus tanks) where excess biomass is settled out as sludge and is swept into a central hopper by the rotating arm. The effluent is then discharged into a nearby stream | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Terry, Shiela |
| Taille de l’image : | 4206 px × 4169 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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