Prof. Dr.-Ing. Marko Zlokarnik studied chemical technology and obtained his Ph.D. in process engineering from RWTH Aachen University and was active in process engineering R & D at Bayer AG, Leverkusen, for 35 years. His work involved reaction apparatus design for chemical production facilities, which, apart from elucidation of reaction kinetics, also brought fundamental work on mixing technology and modelling with it. In the 70s, he developed an especially efficient biological wastewater treatment (Bayer tower biology with flotative removal of activated sludge). From 1970 to 1990, he taught si...