ECETOC Task Force, Cefic-LRI project ECO26 Adapting SimpleTreat for simulating behaviour of chemical substances during industrial sewage treatment With support from Cefic-LRI, an ECETOC task force has expanded the application domain of the sewage treatment simulation model SimpleTreat, allowing it to be used for other purposes than predicting fate of neutral organic substances in municipal STPs. The model now used to calculate Exposure Potentials of a.o. pharmaceuticals. Exposure Potential release fractions to air, (waste)water, soil EU project SOLUTIONS: spERC-based release estimation model wastewater treatment release rates to air, STP effluent (to surface water), STP sludge (to soil) with SimpleTreat vs 4 environmental fate : steady-state mass in air, water, soil) unit-world model, derived from SimpleBox vs 4 calculate ep (kg / kg.s-1) mass in environment (kg) per unit mass used (kg.s-1) exposure potential extent of environmental exposure from unit release rate D van de Meent, L Posthuma, S Fischer, J van Gils, J Struijs, A Striffler, J Baumeister, D Stttler, N Aust (2016) Environmental release fractions and exposure potentials of REACH chemicals. Environmental Toxicology and Chemistry, in preparation simple 2 boxtreat Air/Water/Soil model + SimpleTreat simple 2 boxtreat German Federal Environment Agency UBA calculate Exposure Potentials decision support system KnowSEC Validation SimpleTreat vs 4 measured concs. in STP in/effluents data from noPILLS project data from literature 57 pharmaceuticals in 41 treatment plants 489 data points SimpleTreat right on average Even when right on average, we may be wrong most of the time (Valery Forbes) room for improvement All model are wrong, but some are useful (George Box) SimpleTreat good enough to be useful J Struijs 1,2, D van de Meent 2,3, R van Zelm 2, L Lautz 2, T Breure 2,3, E van der Grinten 3, D Schowanek 4, H Buchholz 4, P Mason 4, R Patoux 4, T Wolf 4, T Austin 4, P Mason 4, J Tolls 4, K van Leeuwen 4, M Galay-Burgos 4 1 JSscience, Zeist, The Netherlands; 2 Department of Environmental Science, Radboud University Nijmegen, The Netherlands; 3 RIVM, Bilthoven, The Netherlands; 4 ECETOC Task Force, Brussels, Belgium Discussion Validity demonstrated on the basis of data pharma-related measurements, collected in INTERREG project noPILLS. Additional data exist on other chemicals. These data have not been used in the validity test shown here. This study has demonstrated applicability of SimpleTreat to treatment operations with non- muncipal HRT, BOD and/or SLR. No other non-municipal water treatment practices (trickling filter, membrane biofiltration, coal filtration, ozonization,....) have been studied. SimpleTreat can now be applied to ionizing substances. Possibilities to cover other categories of chemicals (surfactants, metals, micro/nano particles) have not been studied. New in SimpleTreat beyond traditional neutral organics Ionizing chemicals Franco and Trapp (2010) beyond traditional municipal variable BOD, HRT, SLR according to ECETOC Task Force (2015) TU309 contact Hydraulic residence time matters degradation, sorption to sludge, volatilization J Struijs, D van de Meent, ECETOC Task Force (2016) Expanding the application domain of SimpleTreat. Chemosphere, in preparation water air soil STP release sewer primary solids removal aerobic biological treatment solids liquid separation combined sludge air water soil municipal sewage industrial sewage hospital sewage ibuprofen diclofenac Conclusions application domain SimpleTreat expanded SimpleTreat validated for pharmaceuticals SimpleTreat essential element in EP calculation L Lautz, R van Zelm, J Struijs, D van de Meent (2016) On the validitiy of SimpleTreat for simulation fate of pharmaceuticals during waste water treatment. Environmental Science and Technology, in preparation Acknowledgement