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Implementation, study and calibration of a modified ASM2d for the simulation of SBR processes

TitoloImplementation, study and calibration of a modified ASM2d for the simulation of SBR processes
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2001
AutoriS. Libelli, Marsili, Ratini P., Spagni A., and Bortone G.
RivistaWater Science and Technology
Parole chiaveaccuracy, Activated sludge models, Activated sludge process, Bacteria, Bioreactor, Bioreactors, Calibration, computational model, computer model, Computer simulation, conference paper, Engineering, Fluid, function test, Models, Nitrification, Nitrobacter, Nitrogen, Nitrosomonas, nonhuman, oxidation, Phosphorus, physical sensitivity, pollutant removal, Sensitivity and Specificity, Sequencing batch reactor, sewage, simulation, sludge conditioning, software, Theoretical, Vector Control, Waste disposal

An enhanced process model for SBRs has been developed. Though the basic mechanism largely draws on the Activated Sludge Model n. 2d, its new features are the splitting of the nitrification stage in a two-step process, according to the well known Nitrosomonas-Nitrobacter oxidation sequence, and an improved XPAO dynamics, involved in the anaerobic/aerobic phosphorus removal process. The model was implemented through the DLL technique allowing complied C++ modules to be linked to an ordinary Simulink block diagram. The static sensitivity study revealed that if the parameter vector is partitioned into subsets of biologically related parameters and calibrated separately, the calibration procedure does not present particularly difficult aspects. Trajectory sensitivity showed also to which extent data collection could be optimised in order to improve calibration accuracy. The study of the shape of the error functional generated by parameters couples allows a much more effective calibration strategy.


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Citation KeyMarsiliLibelli200169