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 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Hay Jones, David |
Bildgröße: | 5150 px × 3405 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |