The disposal of sewage WordNet 3.0 & Open English WordNet

Sewage treatment is a type of wastewater treatment which aims to remove contaminants from sewage to produce an effluent that is suitable to discharge to the surrounding environment or an intended reuse application, thereby preventing water pollution from raw sewage discharges. Wikipedia

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. Wikipedia

Treatment of sewage to remove contaminants Wikipedia Disambiguation

Converting wastewater into an effluent for return to the water cycle Wikidata