Sewage treatment. Bacterial anaerobic treatment of sewage in aluminium-clad buildings at a sewage treatment plant. The buildings contain closed chambers or digesters in which sewage sludge is digested by bacteria in oxygen-free (anaerobic) conditions. This digestion process lasts for 10- 30 days and reduces the sewage to carbon dioxide and methane and a humus-like material. The methane can be collected and used as fuel. Photographed in Bavaria,Germany | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Maximilian Stock |
Bildgröße: | 4721 px × 3555 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: |
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