Dr. Puranjan Mishra, studied Biotechnology at Himachal Pradesh University, India. Then he moved University Malaysia Pahang, Malaysia, where he completed his doctorate. In his Ph. D dissertation, he studied waste-water treatment processes for maximum energy recovery from waste, further investigated the impact of nano-metal oxides on the fermentation processes and received degree in area of Renewable Energy and Environmental Engineering. Presently he is carrying out his Post-doctoral at University Malaysia Pahang, Pahang (Malaysia). His current research interest is in the area of anaerobic digestion, Enzymology, Nanomaterials synthesis, mainly for Energetic applications (H2 and CH4, Biomass utilization). His scientific research work has been published in more than 20 peer-reviewed with high impacts manuscripts including book chapter. His works have been cited more than 192 times with an h index of 8 and an i10 index of 8 (https://scholar.google.com.my/citations?user=7n0WuWgAAAAJ&hl=en). He is reviewer of Elsevier’s journal including International journal of hydrogen energy, Journal of Cleaner Production, Waste and Biomass valorisation etc. He has also reviewed many book chapters which later-on published under American Chemical Society and Taylor & Francis publication house.