Prof. Pen-Chi Chiang began his teaching and research activities at the National Taiwan University after he obtained his Ph.D. degree from the Department of Civil Engineering, Purdue University, USA, in 1982. Currently, he is a distinguished professor of the Graduate Institute of Environmental Engineering, National Taiwan University; a director of the Carbon Cycle Research Center of National Taiwan University; a board-certified environmental engineer of the American Academy of Environmental Engineers and Scientists (AAEES); a fellow of the Water Environment Federation (WEF); and a representative of the American Academy of Water Resources Engineers of the American Society of Civil Engineers (ASCE). He has been actively involved in international and national academic associations and has served as a member of the board of directors (1987–2007), executive committee (2001), and academic committee (2008–present) of the WEF; the chairman of the International Association on Water Quality Specialized Conference (2001); the president of the Chinese Institute of Environmental Engineering (2004–2006); and a member of the American Institute of Chemical Engineers Local Chapter (2009–present). Prof. Chiang is known for his work in physicochemical treatment such as carbon adsorption and membrane and ozonation processes. He has published more than 200 papers in the above areas since 1990.