Mark van Loosdrecht is Professor in Environmental Biotechnology at Delft University of Technology, The Netherlands. He graduated (MSc/PhD) from Wageningen University. His PhD research was a combination of Microbiology and Colloid Chemistry. He was appointed at Delft in 1988 and became Full Professor in 1999. His research is characterized by the combination of scientific understanding of complex systems and development of new processes. Dr. van Loosdrecht’s scientific interests are mainly related to biofilm processes, nutrient conversion processes and the role of storage polymers in microbial ecology. In particular, he is interested in new processes related to wastewater treatment and resource recovery. His research has resulted in several processes currently applied on full scale such as the BCFS process, Sharon process, Anammox process and Nereda process. He is a Fellow of the International Water Association (IWA) and past chairman of the IWA Biofilm and the Nutrient removal specialist groups. He is Editor-in-Chief of Water Research. He obtained several prizes for his work, including the Lee Kuan Yew Singapore Water Prize, Stockholm Water Prize and the IWA Grand Award. He is member of the Royal Dutch Academy of Arts and Sciences (KNAW) and the Dutch Academy of Engineering (AcTI) and the US National Academy of Engineering (NAE). He was awarded a knighthood in the order of the Dutch Lion. He has published over 700 scientific papers, has 15 patents and has supervised over 50 PhD students.