Wastewater being treated in aeration tank at sewage treatment plant in Southern California. Air is pumped into the water to promote the growth of bacteria, protozoa, rotifers, nematodes, and other organisms which eat organic material. Sewage treatment is a multi-stage operation that includes physical, chemical and biological processes to remove contaminates from water. | |
Licence : | Droits gérés |
Crédit : | Science Photo Library / Matulavich, Peter |
Model Release : | Le droit n'est pas encore disponible. Merci de nous contacter avant utilisation. |
Property release : | Non requis |
Durée : | 23 Secondes |
Aspect ratio : | 4/3 |
Restrictions : | - |