Sewage works filter beds. These stone-filled tanks are used to remove organic material from sewage by the action of bacteria and other organisms. Photographed at Ray Hall,Birmingham,UK | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Brook, Robert |
Taille de l’image : | 3087 px × 4579 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |