Effect of Using Effective Microorganisms EM-1 on the Performance of Extended Aeration Activated Sludge in Treating Domestic Wastewater. Tikrit j. eng. sci. [انترنت]. 31 ديسمبر، 2009 [وثق 9 نوفمبر، 2026];16(4):53-61. موجود في: https://tj-es.com/ojs/index.php/tjes/article/view/624