1. a Department of Chemical Engineering, College of Chemical and Food Engineering, Wollo University, Kombolcha Institute of Technology, Kombolcha, Ethiopia
2. b Faculty of Chemical and Food Engineering, Bahir Dar Institute of Technology, Bahir Dar University, Bahir Dar, Ethiopia
3. c Department of Chemical Engineering, College of Biological and Chemical Engineering, Addis Ababa Science and Technology University, Addis Ababa, Ethiopia
4. d Bahir Dar Institute of Technology, Bahir Dar University, Ethiopia