کانون تخصصی مهندسی محیط‌زیست و آب و فاضلاب | Specialized Center for Environmental Engineering and Water & Wastewater.

Wastewater Quiz & Notes: Short questions, design & operation tips with a focus on design, operation, wastewater treatment systems, by: Daoud Kaheh, PhD student in water and wastewater engineering from Tehran University, consultant and lecturer in the field of urban and industrial wastewater @Davoodkahehh