Trickling filters at a sewage treatment works. Trickling filters are a type of aerobic wastewater treatment, where sewage or wastewater flows down into a bed of rocks. The flow of wastewater promotes a layer of microbial slime to grow on the bed. Pollutants are removed from the wastewater through adsorption and absorption of organic matter by the microbial layer. Photographed in Wales, UK. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Davies, Andy |
Taille de l’image : | 7360 px × 4912 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |