Dr. Sofia Mai is a Laboratory and Teaching Staff in the Unit of Environmental Science & Technology, School of Chemical Engineering, National Technical University of Athens (NTUA), Zographou Campus, Athens, Greece. She obtained her Diploma Degree in Chemical Engineering in Polymer Science and Technology (2001), a Master’s Degree in Water Resources Science and Technology (2003), and a PhD Degree in Chemical Engineering (2006), all from the NTUA. Dr. Mai specializes in waste and wastewater treatment with an emphasis on agro-industrial waste, anaerobic digestion, composting, and other waste treatment technologies.