List of Articles sewage treatment Open Access Article Abstract Page Full-Text 1 - A Survey on Efficiency of Natural Wastewater Treatment Systems and Activated Sludge for Municipal Wastewater Treatment Reza Shokoohi Abdollah Dargahi Amir Karami 10.30495/jest.2018.15742.2426 Open Access Article Abstract Page Full-Text 2 - بررسی تغییرات اکسیژن محلول و راندمان حذف COD در تصفیه خانه فاضلاب دزفول سعید طاهری قناد Open Access Article Abstract Page Full-Text 3 - Evaluation of performance sewage treatment in Ravanj mohsen Najarchi ali safdar Heidari Open Access Article Abstract Page Full-Text 4 - Trace Analysis of Pharmaceutical Residues in Wastewater Treatment Plants in Rio de Janeiro, Brazil Aldo Pacheco Ferreira 10.22034/jchr.2018.544050