Modeling of Simultaneous Partial Nitrification, Anammox and Denitrification Process In a Single Reactor

Nomenclature: SO2 dissolved oxygen, SS readily biodegradable substrate, SNH4 ammonium nitrogen, NH4+-N, SNO2 nitrite nitrogen, NO2−-N, SNO3 nitrate, NO3−-N, SN2 dinitrogen, N2, XNH aerobic ammonium oxidizers, XNO aerobic nitrite oxidizers, XAN Anammox bacteria, XH hetertrophic organisms, X inert particulate organic material, YNH yield coefficient of XNH, YNO yield coefficient of XNO, YAN yield coefficient of XAN, YH yield coefficient of XH, fx Fraction of inert COD generated in biomass lysis, η anoxic reduction factor, μNH maximum growth rate of XNH, KO2NH affinity constant for oxygen , KNH4NH affinity constant for ammonium, KNO3 affinity constant for nitrate, bNH aerobic endogenous respiration rate, n anoxic reduction factor, μNO maximum growth rate of XNO, KO2NO affinity constant for oxygen, KNO2NO affinity constant for nitrite, bNO aerobic endogenous respiration rate, μAN maximum growth rate of XAN, KO2AN inhibiting constant for oxygen, KNO2AN affinity constant for nitrite, Ki inhibiting coefficient for the nitrite, KNH4AN affinity constant for ammonium, bAN aerobic endogenous respiration rate, μH maximum growth rate of XH, KO2H affinity constant for oxygen, KS affinity constant for substrate, KNO2 affinity constant for nitrite, bH aerobic endogenous respiration rate. Introduction