3 Common Reasons Why Your wastewater treatment process Isn't Working (And How To Fix It)
http://emiliotfst945.angelfire.com/index.blog/1666673/4-dirty-little-secrets-about-the-where-does-wastewater-come-from-industry/
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,