Wastewater Treatment Process Poll of the Day
http://jeffreyigat257.over-blog.com/2019/08/what-is-considered-wastewater-it-s-not-as-difficult-as-you-think.html
Wastewater refers to all effluent (= sewage or liquid waste that is discharged into water bodies either from direct sources or from treatment plants) from household, commercial establishments and institutions,