Dr. Edwin Geo Varuvel is Professor at SRM Institute of Science and Technology, with interests in the areas of waste to biofuels, biogas and hydrogen, energy recovery, engine emission control, alternate fuels, fuel cells, and electric vehicles. Dr. Aloui Fethi is Professor at the INSA Hauts-de-France, Université Polytechnique Hauts-de-France (LAMIH UMR CNRS 8201), with interests in fluid mechanics, energetics energetics and transport phenomena among others.