🌐EnglishEnglishEspañolPortuguêsالعربية中文EntityQ22908586· pop 5· linked from 138 articlesSecondary treatmenttreatment process for wastewater or sewageAvailable in 5 languagesEspañolPortuguêsالعربيةHausavia Wikidata sitelinks · CC0Connectionssewage treatmentEntitybiodegradationEntityCategoriesAquatic ecologyEnvironmental engineeringPollution control technologiesSanitationSewerageSewerage infrastructure