Dr. Mudhar A. Al-Obaidi is a lecturer at the Middle Technical University, Iraq. He obtained his BSc and MSc degrees in chemical engineering from the University of Baghdad and the University of Technology in Iraq in 1993 and 1997, respectively. He obtained his PhD in chemical engineering in 2018 from the University of Bradford, UK. He issued his first scientific book, titled 'Wastewater Treatment by Reverse Osmosis Process', in 2020. His research interests mainly include Chemical Engineering, Environmental Engineering, Process Modelling, Simulation, Optimisation, Wastewater Treatment, Water and Brackish Water Desalination, Separation Technology, Transport Phenomena, Filtration, Membrane Technology, Process Analysis, the Reverse Osmosis Process, and Sensitivity Analysis.