Wastewater treatment. Tanks at a wastewater treatment plant. Heavier particles in the water sink to the bottom of the tank and are pushed into a central drain by the rotating arms. Oil and grease float on top of the water and are skimmed off. Photographed at the Jones Island wastewater treatment plant,Milwaukee,USA | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Hay Jones, David |
Taille de l’image : | 5150 px × 3405 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |