Development, implementation, and validation of a generic nutrient recovery model (NRM) library

C. Vaneeckhaute, F.H.A. Claeys, F.M.G. Tack, E. Meers, E. Belia, P.A. Vanrolleghem
2018 Environmental Modelling & Software  
The reported research developed a generic nutrient recovery model (NRM) library based on detailed chemical solution speciation and reaction kinetics, with focus on fertilizer quality and quantity as model outputs. Dynamic physicochemical three-phase process models for precipitation/crystallization, stripping and acidic air scrubbing as key unit processes were developed. In addition, a compatible biologicalphysicochemical anaerobic digester model was built. The latter includes sulfurgenesis,
more » ... sulfurgenesis, biological N/P/K/S release/uptake, interactions with organics, among other relevant processes, such as precipitation, ion pairing and liquid-gas transfer. Using a systematic database reduction procedure, a 3-to 5-fold improvement of model simulation speeds was obtained as compared to using full standard thermodynamic databases. Missing components and reactions in existing standard databases were discovered. Hence, a generic nutrient recovery database was created for future applications. The models were verified and validated against a range of experimental results. Their functionality in terms of increased process understanding and optimization was demonstrated.
doi:10.1016/j.envsoft.2017.09.002 fatcat:wzsv2bgr7ba2rgiiinomfdaduq