Model Migration Service

Maybe you wish to use Sumo but don’t have the desire to rebuild plant models that were already developed and calibrated in older packages.

In those cases when you have a model in another simulation package that can write a comprehensive report automatically, we are offering a migration service to our customers. You send us the report and we’ll send back the equivalent configuration in Sumo.

This service is free of charge until at least the end of 2018 or further notice. Later it may cost 100-500 US per configuration depending on the complexity and the number of models to be converted.


Software Development

  • we can provide a dynamic simulation engine powering your own application
  • we can implement environmental knowledge solutions (training, design, operation) in any kind of software environment (C, C++, C#, .NET, Java, Qt, Visual Studio, VBA, Windows, Linux, Android, etc.)


Model Development

  • we evaluate advanced process technologies including industrial treatment systems
  • we have advanced methods to establish experimental data quality and analyze & optimize process performance based on data


We are developing, advancing, applying and publishing mathematical models for the description of

  • Biokinetic degradation and conversion processes (advanced BNR)
  • Equilibrium chemistry based methods (pH and precipitation estimation)
  • Physico-chemical separation and conversion processes

which cover the following wastewater topics (selection):

Modeling methodology

  • Elemental balancing:
    Takács, I.; Vanrolleghem, P.A.; Wett, B.; Murthy, S. (2007) Elemental balancing-based methodology to establish reaction stoichiometry in environmental modeling. Proc. Watermatex 2007, Washington DC. Water Science & Technology, 56/9, 37-41
  • Schematic representation:
    Comeau, Y and Takács, I. (2008) Schematic Representation of Activated Sludge Models. Proc. 81st Annual Water Environment Federation Technical Exhibition and Conference, Chicago, Illinois, USA Oct. 18-22
  • Plant-wide modeling:
    Wett, B. and Alex, J: Impacts of separate rejection water treatment on the overall plant performance. Proc. 3rd Int. Symp. on Anaerobic Digestion of Solid Waste, Munich 2002. Water Science & Technology, 48/4, 139-146, 2003

Phase separation

  • Takács, I.; Patry, G.G.; Nolasco, D. (1991): A dynamic model of the thickening/clarification process. Wat.Res., 25, 1263-1271
  • Wett, B. (2002): A straight interpretation of the solids flux theory for a 3 layer sedimentation model. Water Research 36/12, p. 2949-2958

Nitrogen removal

  • High-strength ammonia wastewater:
    Wett, B. and Rauch, W. (2003): The role of inorganic carbon limitation in biological nitrogen removal of extremely ammonia concentrated wastewater. Water Research, 37/5, 1100-1110
    Sin, G.; Kaelin, D.; Kampschreur, M.J.; Takács, I.; Wett, B.; Gernaey, K.V.; Rieger, L.; Siegrist, H. and van Loosdrecht, M.C.M. (2008): Modelling nitrite in wastewater treatment systems: A discussion of different modelling concepts. Proc. 1st IWA/WERF Wastewater Treatment Modelling Seminar, Quebec. Water Science & Technology, 58/6, 1155-1171
    Wett, B; Jimenez, J.A.; Takács, I.; Murthy, S.; Bratby, J.R.; Holm, N.C.; Rönner-Holm, S.G.E. (2010): Models for Nitrification Process Design: One or Two AOB Populations? Proc. WWT-Mod, Quebec; Water Science & Technology, 64/3, 568-578
    Wett, B.; Hell, M.; Nyhuis, G.; Puempel, T.; Takács, I.; Murthy, S. (2009): Syntrophy of aerobic and anaerobic ammonia oxidisers. Proc. IWA Nutrient Removal Conf., Krakow. Water Science & Technology, 61/8, 1915-1922

Phosphorus removal

  • Smith, D. S.; Takács, I.; Murthy, S.; Diagger, G.; Szabó, A. (2008) Phosphate complexation model and its implications for chemical phosphorus removal. Water Environment Research, 80 (5), 428-438
  • Szabó, A.; Takács, I.; Murthy, S.; Daigger, G.; Licskó, I.; Smith, D. S. (2008) The significance of design and operational variables in chemical phosphorus removal. Water Environment Research, 80 (5), 407-416.
  • Takács, I.; Murthy, S.; Smith, D. S.; McGrath, M. (2006) Chemical phosphorus removal to extremely low levels: experience of two plants in the Washington, D.C. area. Water Science & Technology,  53, 21–28.

Anaerobic digestion

  • Wett, B.; Takács, I.; Batstone, D.; Wilson, C.; Murthy, S. (2012) Anaerobic model for high-loaded or high-temperature digestion – additional pathway of acetate oxidation. Proc. WWTMod 2012, Quebec, Canada.