Dr. Giorgio Mannina is Professor of Sanitary and Environmental Engineering at the Engineering Department of Palermo University, Italy. His research interest and focus is on resource recovery from wastewater, advanced wastewater treatments (MBR, MBBR, hybrid processes, IFAS, granular systems, etc.), BNR processes, mathematical modeling, and water quality issues related to integrated urban drainage systems. Prof. Ashok Pandey is currently Executive Director, Centre for Energy and Environmental Sustainability-India, Lucknow. His major research and technological development interests are industrial and environmental biotechnology and energy biosciences, focusing on biomass to biofuels and chemicals, waste to wealth and energy, etc.