Đurđica Kovačić is an Assistant Professor at the Faculty of Agrobiotechnical Sciences Osijek, University of Josip Juraj Strossmayer in Osijek, Croatia. She completed her PhD studies in Nature and Environmental Protection, jointly organized by the Ruđer Bošković Institute, Zagreb, and the University of Josip Juraj Strossmayer in Osijek, Croatia. Her research interests include anaerobic digestion, biogas production, lignocellulose pretreatment, agricultural waste valorization, and circular bioeconomy approaches. She has participated in several national and international research projects related to renewable energy and environmental sustainability. Her scientific work includes studies on anaerobic digestion process optimization and pretreatment methods, particularly physical pretreatment methods. She has authored and co-authored scientific publications in international journals and regularly participates in international scientific conferences.