01/09/2026
🎓 Three Ph.D. Candidates Successfully Defend Their Dissertations at AASTU
September 01,2026
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Three Ph.D. candidates from Addis Ababa Science and Technology University (AASTU) have successfully defended their dissertations, presenting innovative research addressing important challenges in renewable energy, advanced manufacturing, and environmental engineering.
🔹 Yigzaw Likina defended his dissertation titled “Modelling and Optimising of Biogas Production Anaerobically Co-Digestion Water Hyacinth, Macroalgae, and Poultry Manure: High-Pressure Water Scrubbing Simulation.” He conducted his research under the supervision of Prof. Dr.-Ing. Essayas Alemayehu and Dr. Zemene Worku. His research focuses on optimizing biogas production through the anaerobic co-digestion of organic materials and improving biogas purification through high-pressure water scrubbing simulation.
🔹 Shimelis Tamene , from the Department of Mechanical Engineering (Manufacturing Engineering Stream), defended his dissertation titled “Characterization and Investigation of Process Parameters Effects on 3D-Printed Polyether Ether Ketone for Dental Application.” He conducted his research under the supervision of Dr. Abraham Debebe Woldeyohannes (Ph.D.). His study explores the properties and processing parameters of 3D-printed PEEK materials for potential applications in dental technology.
🔹 Genetu Tesfa , from the Department of Environmental Engineering, defended his dissertation titled “Development and Application of Iron-Based Electro-Fenton Catalyst for Ceftriaxone Degradation in Hospital Wastewater.” He conducted his research under the supervision of Dr. Abebe Worku, Dr. Tsedekech G/Meskel, and Dr. Jemal Fito. His research focuses on developing an advanced treatment method for removing pharmaceutical contaminants from hospital wastewater, contributing to safer and more sustainable water management.
🎉 Congratulations to Yigzaw , Shimelis , and Genetu on their successful Ph.D. defenses and outstanding academic achievements!
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