Hilal Ünyay, PhD, is a Chemical Engineer and researcher at Lodz University of Technology, Poland. Her research focuses on biomass valorization, torrefaction technologies, biochar production and characterization, anaerobic digestion, renewable energy, and sustainable waste management. She has participated in several international research projects, including Horizon Europe and NAWA-funded initiatives. Dr. Ünyay has authored and co-authored numerous peer-reviewed publications in the fields of bioenergy, biomass conversion, and environmental engineering. She also serves as a reviewer for international scientific journals and as a Guest Editor for a Special Issue on biomass and the bioeconomy. Her work aims to develop sustainable biomass conversion technologies that contribute to the circular economy and carbon-neutral energy systems. Her research focuses on biomass torrefaction, biochar characterization, and the application of biochar in anaerobic digestion and environmental technologies.