Professor Dr. Ioannis K. Kalavrouziotis with PhD in Environmental Geochemistry from Department of Geology, University of Patras, Greece (1999) is currently a Professor and President of Hellenic Open University, and is Director of Education on Wastewater Management Master Programme, and Visiting Fellow in the University of Derby, UK (2015-2018). Guest Professor of Hubei University, China (09 May, 2019- 2022). He taught at the Department of Environmental and Natural Resources Management, University of Western Greece (2000-2013). He has completed administrative responsibilities as: Agronomist of the Greek Ministry of Agriculture (1988-2000), Director of Western Greece Region Administration (1993), Member of the Administrative Board of the National Agricultural Research Foundation (2006-2009), President of the Sector for the Management of Messologion Lagoon (2006-2009). He is a member of IWA and President of IWA Symposium on ‘Water, Wastewater, and Environment: Traditions and Culture’, 2014, Patras, Greece, a member of the interim Management Committee of IWA Specialist Group on Water and Wastewater in Ancient Civilizations. President of the Regional Council for Research and Innovation of the Western Greece Region (2020-2024). He has published 5 Books and chapters, 108 peer-reviewed full research papers in International Journals, 72 papers in International Conferences, 40 papers in National Conferences and more than 100 articles in journals and newspapers.