Before revision: Sewage treatment plant (a type of wastewater treatment plant) in Cuxhaven, Germany Wastewater treatment is a process which removes and eliminates contaminants from wastewater and converts this into an effluent that can be returned to the water cycle.
After revision: Sewage treatment plant (a type of File:2012-05-28 Fotoflug Cuxhaven Wilhelmshaven DSCF9867 (crop).jpg| Wastewater treatment is a process which removes and eliminates contaminants from wastewater and converts this into an effluent that can be returned to the water cycle.