"The objective of this project is to develop a new set of mathematical models describing some of the new focus areas/challenges that wastewater treatment plants (WWTP) are facing nowadays. These new focus areas/challenges include nutrient recycling & recovery, micropollutant & eco-toxicity removal and energy recovery & greenhouse gases minimization. The most innovative part of the project will rely on finding new ways to operate these facilities satisfying the new necessities by means of developing, implementing and simulating novel (plant-wide) control strategies / operational procedures. In order to avoid unbiased comparisons a new benchmarking procedure will be proposed. This procedure will comprise a pre-defined plant layout, simulation models, influent loads, test procedures and evaluation criteria. Finally, the study will be complemented with a multi-criteria decision module that will rank the different technological solution taking into account multiples aspects at the same time. The project will be hosted in the Department of Chemical and Biochemical Engineering at the Technical University of Denmark but with numerous collaborations amongst other research centres and specialized Task Groups of the International Water Association. One of the main outcomes of the project will be a software package that will be used decision support tool, which will be (freely) distributed to water professionals, process managers and environmental engineers."