**About the Editors**

**Dimitrios Kalderis** Dr. Dimitrios Kalderis is Assoc. Professor in the Department of Electronics Engineering, at the Hellenic Mediterranean University, Chania, Greece. He obtained a B.Sc. in Chemistry from the School of Chemistry, University of Leeds, UK, and a Ph.D. in Environmental Chemistry from the same university. His research interests involve the processing of biomass/agricultural waste for the production of added-value materials such as biochars and hydrochars, the hydrothermal carbonization of industrial wastewaters and solid waste, and the remediation of soils contaminated with organic substances. He has participated in more than 10 EU- and nationally funded projects and he has published more than 50 papers in peer-reviewed international journals.

**Vasiliki Skoulou** Dr. Vasiliki Skoulou is Assoc. Professor (Senior Lecturer) and Director of Research of Chemistry-Biochemistry and Chemical Engineering Departments at the University of Hull, UK. She holds a B.Sc., Integrated Masters, and a Ph.D. in Chemical Engineering from the Aristotle University of Thessaloniki, Greece, and an M.Sc. in Environmental Protection and Sustainable Development. Her research focuses on biomass waste pretreatments, low carbon thermal/thermochemical treatments (mainly pyrolysis and gasification) of lignocellulosic biomass residues, solid fuels, waste, and their blends, as well as designing of thermochemical reactors for waste to energy, H2, and char-activated carbons production. She has participated in more than 25 research projects in the field of low-carbon biomass waste to energy, and the outcomes of her research are included in more than 75 publications in book chapters, journals, and conference proceedings.
