In this paper a novel hydrodynamic wastewater treatment (WWT) model based on smoothed particle hydrodynamics (SPH) is presented. The hydraulics of the wastewater treatment plant is modelled in detail with SPH. The SPH solver is coupled to the activated sludge model such that the influence on biokinetic processes is described. The key innovation of the present WWT model is that both the biokinetics and the wastewater hydraulics are simultaneously solved for non-steady flows. After validating the present method against the software ASIM 5, the capabilities are demonstrated for a full-scale treatment plant simulation. We investigate the stirrer and aeration induced mixing within the reactor compartments as well as the resulting concentrations of the biokinetic compounds. Following the establishment of a local coupling between the hydraulics and the biokinetics, the biokinetic concentrations within a treatment plant can be spatially resolved with a high resolution. SPHASE – Smoothed Particle Hydrodynamics Activated Sludge Engine Gregor Burger, Michael Meister, Daniel Winkler Michael Meister, Unit of Environmental Engineering, University of Innsbruck, Technikerstrasse 13, 6020 Innsbruck, Austria, Michael.Meister@uibk.ac.at on application to the author 2015 PC with multi-core processor, optional: CUDA compatible GPU Linux, Mac OS X, Windows C++ command line, graphical user interface (constant) reference particle index neighbouring particle index reactor index biokinetic compound index 
Wastewater treatment modelling with smoothed particle hydrodynamics