Dr. Mahmoud Nasr is an associate professor of environmental engineering at Egypt-Japan University of Science and Technology (E-JUST) and Alexandria University, Egypt, since 2020. He received his Ph.D. degree in 2014 from the Egypt-Japan University of Science and Technology (E-JUST) and his M.Sc. from Alexandria University in 2010. He was a postdoc fellow at the Institute for Water and Wastewater Technology from Durban University of Technology (DUT), South Africa in 2015, a research scientist at the Chemical Engineering Department, Texas A&M University, Qatar from 2016 to 2018, and a visiting scientist at DUT in 2019.

He has participated in several international projects, published more than 150 papers in national and international journals and conferences, and contributed to more than 10 chapters. He was also awarded the Top 10 Postdoc Fellow at DUT in 2016. He is a member of the Editorial Board of the Journal of Scientific Research and Reports. Dr. Balasubramani Ravindran, is a Professor (Asst.) in the Department of Environmental Energy & Engineering, Kyonggi University, Suwon, South Korea. He has around 20 years of research experience in environmental technology. His primary research focuses on developing novel treatment technologies for solid waste and wastewater generated from domestic and industries through aerobic and anaerobic fermentation/ digestion; Composting/vermicomposting, etc.

He has more than 150 notable publications in international peer- reviewed journals, edited five books, published notable book chapters, and three patents to his credit. He has around 5000 citations and the H- index is 38 in scopus. He has received national and international research grant funds for his research project. He serves as an Academic Editor, Editorial board member, and Guest editor in several international journals. He was also recognized as Top 2 % of Scientists in 2023, published by Stanford University in the research areas of " Biotechnology, Environmental Sciences, and Enabling and Strategic Technologies". He received the "Best Researcher-IBET 2017" award for Exceptional Performance and Contributions to 'International Bio-energy technology/eco protection/organic food/green business' from the International Centre for Biogas & Bio-energy Technology, India.