Ruano García, María VictoriaSerralta Sevilla, JoaquínRibes Bertomeu, JoseGarcía Usach, Mª FranciscaBouzas Blanco, AlbertoBarat, RamónSeco Torrecillas, AuroraFerrer Polo, José2014-01-152012-050959-3330https://riunet.upv.es/handle/10251/34919In this paper, two practical case studies for upgrading two wastewater treatment plants (WWTPs) using the general model BNRM1 (Biological Nutrient Removal Model No. 1) are presented. In the first case study, the Tarragona WWTP was upgraded by reducing the phosphorus load to the anaerobic digester in order to minimize the precipitation problems. Phosphorus load reduction was accomplished by mixing the primary sludge and the secondary sludge and by elutriating the mixed sludge. In the second case study, the Alcantarilla WWTP, the nutrient removal was enhanced by maintaining a relatively low dissolved oxygen concentration in Stage A to maintain the acidogenic bacteria activity. The VFA produced in Stage A favour the denitrification process and biological phosphorus removal in Stage B. These case studies demonstrate the benefits of using the general model BNRM1 to simulate settling processes and biological processes related to both anaerobic and aerobic bacteria in the same process unit.8Reserva de todos los derechosBiological nutrient removalBNRM1Plant-wide mathematical modellingWWTP upgradingWaste water treatment plant (WWTP)Activated sludge modelsWaste waterCalibrationSimulationASM2DTECNOLOGIA DEL MEDIO AMBIENTEArtículo10.1080/09593330.2011.604877Cerrado1479-487X