Prof. dr. ir. Mark C.M. van Loosdrecht is a renowned environmental scientist and engineer, combining scientific understanding of microorganisms and microbial communities with process engineering for technology development. He is particularly 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 aerobic granular sludge (Nereda). Mark van Loosdrecht is the author of over 700 ISI-indexed papers (h-index 110), holds 20 patents and has supervised over 60 PhD students. He is editor-in-chief of the leading scientific journal ‘Water Research’ and Distinguished Fellow of the International Water Association (IWA). Mark van Loosdrecht has been honoured repeatedly nationally and internationally, both because of his fundamental scientific work and for the practical applications resulting from it. He has obtained the Stockholm Water Prize (2018), Lee Kuan Yew Singapore Water Prize (2012), the NWO Spinoza Prize (2014) and the IWA Grand Award (2008), among other prizes. 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).