**About the Editors**

**Vasileios A. Tzanakakis** is Assistant Professor in the Department of Agriculture of Hellenic Mediterranean University. He has received a bachelor's, master's and Ph.D. degrees from Agricultural University of Athens, Greece, Department of Natural Resources Management and Agricultural Engineering. He has received scholarship for post-doc research in Norwegian University of Life Sciences, in Norway, by State Scholarships Foundation (IKY)—EEA Grands from 2014 to 2016, and has been granted by Fulbright Foundation Greece to contact research, in USA, in Oregon State University (2018). Also, he has participated in research projects in Greece; in Region of Crete, in Technical University of Crete, in Hellenic Agricultural Organization (HAO)-"Demeter", and, recently, in Hellenic Mediterranean University. Research work of Vasileios has been published in peer-reviewed international journals, book chapters and conference' proceedings. He also has been guest editor in journals' special issues. His current research interests are soil (bio) chemistry and fertility, soil and water resources management, and reuse and climate change mitigation and adaptation practices in agriculture.

**Nikolaos V. Paranychianakis** received his diploma in 1994 and his Ph.D Thesis in 2001 from the Department of Natural Resources and Agricultural Engineering of the Agricultural University of Athens. He was employed as a post-doc researcher in the Department of Biology of the University of Crete from 2004 to 2006. Nikolaos associated with the School of Environmental Engineering in 2008 and leads the Lab of Agricultural Engineering. Nikolaos has participated in many EU-founded and national projects dealing with water-use efficiency, effluent reuse in agriculture, natural wastewater treatment systems, plant response to abiotic stressors and biogeochemical cycles of nutrients. He has published three book chapters as well as 40 journal articles. Nikolaos has been guest editor in two journal issues. His current research activities focus on the mechanisms regulating the biogeochemistry of C and N in natural and manmade ecosystems, and most specifically on their ecology, biochemistry, and molecular biology, their response to environmental stimulus and their modeling.

**Andreas N. Angelakis** was a Water Resources Engineer at the HAO-Demeter, Agricultural Research Institution of Crete, Iraklion and Technical Consultant of Hellenic Union of Municipal Enterprises for Water Supply and Sewerage, Larissa, Greece. He graduated from Agricultural Univ. of Athens, Greece (BS in Agronomy), UC Riverside, USA (MS in Soil Sci.), and UC Davis, USA (BS in Civil Eng., MS in Water Sci., and Ph. D. in Soil Physics). He is the author/co-author of over 500 publications mostly in the scientific fields of environmental engineering; Aquatic wastewater management systems; small systems of water and wastewater management; treated wastewater and reclamation and reuse; and water and wastewater technologies in ancient civilizations. He has over 5500 SCH citations and an i10-index of 95. He has participated, mostly as invited speaker by the organizing/scientific committee in more than 120 international symposia and/or conferences in the last 25 years. He is Editor, Associated Editor, and/or a member of the Editorial Boards of several scientific journals. He is an active member of the European Academy of Sciences and Arts and an honorary professor of Hubei University, Wuhan, China. Moreover, he is an IWA (International Water Association) distinguished fellow and an honorary member of the IWA and of the Hellenic Water Association (HWA), as well as the IWA Strategic Council. He is the president of the IWA SG on water and wastewater in ancient civilizations. In addition, he is the past president of EurEau (Federation of European Water and Wastewater Services) and the EurEau WG on Water Reuse. He was recently awarded by the Hellenic Committee of the International Association of Hydrogeology.
