Georgios Giakoumakis: 2023-2025: Postdoctoral Fellow, Dept. Industrial Management and Technology, University of Piraeus, Greece. 2017-2022: PhD in Energy and Environment, title “Industrial processes for the valorization of medical waste fractions.” Dept. Industrial Management and Technology, University of Piraeus, Greece. 2013-2016: MBA at Athens University of Economics and Business, International Master of Business Administration (General Degree). 2005-2014: Diploma in Chemical Engineering, Chemical Engineering Dept., Patras University, Greece. Specialized in Materials Diploma Thesis: “Manufacture concrete using ferronickel byproducts for radiation absorption”. Keywords: wastes, industrial processes, energy, biomass, bioenergy, biorefinery.

Dimitrios Sidiras: Born 1960 (Lamia, Greece). Diploma, Chemical Engineer, Department of Chemical Engineering, National Technical University of Athens (1984) and Doctor of Engineering (Ph.D.), Department of Chemical Engineering, National Technical University of Athens (1990). Professor, Dept. Industrial Management & Technology, School of Maritime and Industrial Studies, University of Piraeus: Lecturer (30/8/1999–21/6/2005), Assistant Professor (22/6/2005–14/6/2011), Associate Professor (15/6/2011–28/6/2016), and Full Professor (29/6/2016–today). Research interests: biomass and other renewable energy sources. Experimental and computational simulation of industrial/chemical processes. Economo-technical analysis of industrial branches/organic chemical industry. Natural resources management. GIS-based management/environmental management/manufacturing of agricultural products/byproducts/residues. Teaching methodology/distance learning.