• Name: Abdullah Saghir . • Email: a.saghir@secdo.org • Ph.D in 2011 in civil engineering, environmental engineering department of Aleppo University, Chief Executive officer of Syrian engineers for construction and development organization (SECD). The Most Important academic published researchers : 1- Industrial wastewater treatment in Arabic world (1) Book, published in Lebanon, 455 pages, 2017. 2- Biological treatment of Slaughter wastewater by UASB reactor Jordan /University of Jordan, Dirasat journal,2013. 3- Reuse of treated slaughterhouses wastewater which has treated by advanced biological treatment method Syria/AlBath University, 2011. 4- Identify Kinetics growth of bacteria activity in aeration tank which is related to BOD5 removal and nitrification Process in advanced treatment slaughterhouses wastewater, Syria/Aleppo University, Engineering Science Series (99), 2011. 5- Treatment of wastewater slaughter houses by UASB reactor followed by an anoxic tank, aeration tank and final settling tank, Syria/Aleppo University, Engineering Science Series (92), 2011. 6- Biological treatment for slaughterhouses wastewater, Syria/Aleppo University, Engineering Science Series (88) ,2010. 7- Anaerobic biological treatment of high organic load of industrial wastewater by UASB reactor. Syria/Aleppo University, Engineering Science Series (58) , 2007.