Activated Sludge Model No.2d (ASM2d)#

class qsdsan.processes.ASM2d(components=None, iN_SI=0.01, iN_SF=0.03, iN_XI=0.02, iN_XS=0.04, iN_BM=0.07, iP_SI=0.0, iP_SF=0.01, iP_XI=0.01, iP_XS=0.01, iP_BM=0.02, iTSS_XI=0.75, iTSS_XS=0.75, iTSS_BM=0.9, f_SI=0.0, Y_H=0.625, f_XI_H=0.1, Y_PAO=0.625, Y_PO4=0.4, Y_PHA=0.2, f_XI_PAO=0.1, Y_A=0.24, f_XI_AUT=0.1, K_h=3.0, eta_NO3=0.6, eta_fe=0.4, K_O2=0.2, K_NO3=0.5, K_X=0.1, mu_H=6.0, q_fe=3.0, eta_NO3_H=0.8, b_H=0.4, K_O2_H=0.2, K_F=4.0, K_fe=4.0, K_A_H=4.0, K_NO3_H=0.5, K_NH4_H=0.05, K_P_H=0.01, K_ALK_H=0.1, q_PHA=3.0, q_PP=1.5, mu_PAO=1.0, eta_NO3_PAO=0.6, b_PAO=0.2, b_PP=0.2, b_PHA=0.2, K_O2_PAO=0.2, K_NO3_PAO=0.5, K_A_PAO=4.0, K_NH4_PAO=0.05, K_PS=0.2, K_P_PAO=0.01, K_ALK_PAO=0.1, K_PP=0.01, K_MAX=0.34, K_IPP=0.02, K_PHA=0.01, mu_AUT=1.0, b_AUT=0.15, K_O2_AUT=0.5, K_NH4_AUT=1.0, K_ALK_AUT=0.5, K_P_AUT=0.01, k_PRE=1.0, k_RED=0.6, K_ALK_PRE=0.5, path=None, **kwargs)#

Activated Sludge Model No. 2d in original notation. [1], [2]

Parameters:
  • components (class:CompiledComponents, optional) – Components corresponding to each entry in the stoichiometry array, defaults to thermosteam.settings.chemicals.

  • iN_SI (float, optional) – Nitrogen content of inert soluble COD, in [g N/g COD]. The default is 0.01.

  • iN_SF (float, optional) – Nitrogen content of fermentable substrate, in [g N/g COD]. The default is 0.03.

  • iN_XI (float, optional) – Nitrogen content of inert particulate COD, in [g N/g COD]. The default is 0.02.

  • iN_XS (float, optional) – Nitrogen content of slowly biodegradable substrate, in [g N/g COD]. The default is 0.04.

  • iN_BM (float, optional) – Nitrogen content of biomass, in [g N/g COD]. The default is 0.07.

  • iP_SI (float, optional) – Phosphorus content of inert soluble COD, in [g P/g COD]. The default is 0.0.

  • iP_SF (float, optional) – Phosphorus content of fermentable substrate, in [g P/g COD]. The default is 0.01.

  • iP_XI (float, optional) – Phosphorus content of inert particulate COD, in [g P/g COD]. The default is 0.01.

  • iP_XS (float, optional) – Phosphorus content of slowly biodegradable substrate, in [g P/g COD]. The default is 0.01.

  • iP_BM (float, optional) – Phosphorus content of biomass, in [g P/g COD]. The default is 0.02.

  • iTSS_XI (float, optional) – TSS to COD ratio for inert particulate COD, in [g TSS/g COD]. The default is 0.75.

  • iTSS_XS (float, optional) – TSS to COD ratio for slowly biodegradable substrate, in [g TSS/g COD]. The default is 0.75.

  • iTSS_BM (float, optional) – TSS to COD ratio for biomass, in [g TSS/g COD]. The default is 0.9.

  • f_SI (float, optional) – Production of soluble inerts in hydrolysis, in [g COD/g COD]. The default is 0.0.

  • Y_H (float, optional) – Heterotrophic yield coefficient, in[g COD/g COD]. The default is 0.625.

  • f_XI_H (float, optional) – Fraction of inert COD generated in heterotrophic biomass lysis, in [g COD/g COD]. The default is 0.1.

  • Y_PAO (float, optional) – PAO yield coefficient, in[g COD/g COD]. The default is 0.625.

  • Y_PO4 (float, optional) – PP requirement (PO4 release) per PHA stored, in [g P/g COD]. The default is 0.4.

  • Y_PHA (float, optional) – PHA requirement for PP storage, in [g COD/g P]. The default is 0.2.

  • f_XI_PAO (float, optional) – Fraction of inert COD generated in PAO lysis, in [g COD/g COD]. The default is 0.1.

  • Y_A (float, optional) – Autotrophic yield, in [g COD/g N]. The default is 0.24.

  • f_XI_AUT (float, optional) – Fraction of inert COD generated in autotrophic biomass lysis, in [g COD/g COD]. The default is 0.1.

  • K_h (float, optional) – Hydrolysis rate constant, in [d^(-1)]. The default is 3.0.

  • eta_NO3 (float, optional) – Reduction factor for anoxic hydrolysis, dimensionless. The default is 0.6.

  • eta_fe (float, optional) – Anaerobic hydrolysis reduction factor, dimensionless. The default is 0.4.

  • K_O2 (float, optional) – O2 half saturation coefficient for hydrolysis, in [g O2/m^3]. The default is 0.2.

  • K_NO3 (float, optional) – Nitrate half saturation coefficient for hydrolysis, in [g N/m^3]. The default is 0.5.

  • K_X (float, optional) – Slowly biodegradable substrate half saturation coefficient for hydrolysis, in [g COD/g COD]. The default is 0.1.

  • mu_H (float, optional) – Heterotrophic maximum specific growth rate, in [d^(-1)]. The default is 6.0.

  • q_fe (float, optional) – Fermentation maximum rate, in [d^(-1)]. The default is 3.0.

  • eta_NO3_H (float, optional) – Reduction factor for anoxic heterotrophic growth, dimensionless. The default is 0.8.

  • b_H (float, optional) – Lysis and decay rate constant, in [d^(-1)]. The default is 0.4.

  • K_O2_H (float, optional) – O2 half saturation coefficient for heterotrophs, in [g O2/m^3]. The default is 0.2.

  • K_F (float, optional) – Fermentable substrate half saturation coefficient for heterotrophic growth, in [g COD/m^3]. The default is 4.0.

  • K_fe (float, optional) – Fermentable substrate half saturation coefficient for fermentation, in [g COD/m^3]. The default is 4.0.

  • K_A_H (float, optional) – VFA half saturation coefficient for heterotrophs, in [g COD/m^3]. The default is 4.0.

  • K_NO3_H (float, optional) – Nitrate half saturation coefficient for heterotrophs, in [g N/m^3]. The default is 0.5.

  • K_NH4_H (float, optional) – Ammonium (nutrient) half saturation coefficient for heterotrophs, in [g N/m^3]. The default is 0.05.

  • K_P_H (float, optional) – Phosphorus (nutrient) half saturation coefficient for heterotrophs, in [g P/m^3]. The default is 0.01.

  • K_ALK_H (float, optional) – Alkalinity half saturation coefficient for heterotrophs, in [mol(HCO3-)/m^3]. The default is 0.1.

  • q_PHA (float, optional) – Rate constant for storage of PHA, in [d^(-1)]. The default is 3.0.

  • q_PP (float, optional) – Rate constant for storage of PP, in [d^(-1)]. The default is 1.5.

  • mu_PAO (float, optional) – PAO maximum specific growth rate, in [d^(-1)]. The default is 1.0.

  • eta_NO3_PAO (float, optional) – Reduction factor for anoxic growth of PAO, dimensionless. The default is 0.6.

  • b_PAO (float, optional) – PAO lysis rate constant, in [d^(-1)]. The default is 0.2.

  • b_PP (float, optional) – PP lysis rate constant, in [d^(-1)]. The default is 0.2.

  • b_PHA (float, optional) – PHA lysis rate constant, in [d^(-1)]. The default is 0.2.

  • K_O2_PAO (float, optional) – O2 half saturation coefficient for PAO, in [g O2/m^3]. The default is 0.2.

  • K_NO3_PAO (float, optional) – Nitrate half saturation coefficient for PAO, in [g N/m^3]. The default is 0.5.

  • K_A_PAO (float, optional) – VFA half saturation coefficient for PAO, in [g COD/m^3]. The default is 4.0.

  • K_NH4_PAO (float, optional) – Ammonium (nutrient) half saturation coefficient for PAO, in [g N/m^3]. The default is 0.05.

  • K_PS (float, optional) – Phosphorus half saturation coefficient for storage of PP, in [g P/m^3]. The default is 0.2.

  • K_P_PAO (float, optional) – Phosphorus (nutrient) half saturation coefficient for PAO, in [g P/m^3]. The default is 0.01.

  • K_ALK_PAO (float, optional) – Alkalinity half saturation coefficient for PAO, in [mol(HCO3-)/m^3]. The default is 0.1.

  • K_PP (float, optional) – Poly-phosphate half saturation coefficient for storage of PHA, in [g P/g COD]. The default is 0.01.

  • K_MAX (float, optional) – Maximum ratio of poly-phosphate to PAO, in [g P/g COD]. The default is 0.34.

  • K_IPP (float, optional) – Inhibition coefficient for poly-phosphate storage, in [g P/g COD]. The default is 0.02.

  • K_PHA (float, optional) – PHA half saturation coefficient, in [g COD/g COD]. The default is 0.01.

  • mu_AUT (float, optional) – Autotrophic maximum specific growth rate, in [d^(-1)]. The default is 1.0.

  • b_AUT (float, optional) – Autotrophic decay rate, in [d^(-1)]. The default is 0.15.

  • K_O2_AUT (float, optional) – O2 half saturation coefficient for autotrophs, in [g O2/m^3]. The default is 0.5.

  • K_NH4_AUT (float, optional) – Ammonium (nutrient) half saturation coefficient for autotrophs, in [g N/m^3]. The default is 1.0.

  • K_ALK_AUT (float, optional) – Alkalinity half saturation coefficient for autotrophs, in [mol(HCO3-)/m^3]. The default is 0.5.

  • K_P_AUT (float, optional) – Phosphorus (nutrient) half saturation coefficient for autotrophs, in [g P/m^3]. The default is 0.01.

  • k_PRE (float, optional) – Rate constant for phosphorus precipitation with Fe(OH)3, in [m^3/g Fe(OH)3/d]. The default is 1.0.

  • k_RED (float, optional) – Rate constant for redissoluation of FePO4, in [d^(-1)]. The default is 0.6.

  • K_ALK_PRE (float, optional) – Alkalinity half saturation coefficient for P precipitation, in [mol(HCO3-)/m^3]. The default is 0.5.

  • path (str, optional) – Alternative file path for the Gujer matrix. The default is None.

Examples

>>> from qsdsan import processes as pc, set_thermo
>>> cmps = pc.create_asm2d_cmps()
>>> asm2d = pc.ASM2d()
>>> asm2d.show()
ASM2d([aero_hydrolysis, anox_hydrolysis, anae_hydrolysis, hetero_growth_S_F, hetero_growth_S_A, denitri_S_F, denitri_S_A, ferment, hetero_lysis, PAO_storage_PHA, aero_storage_PP, PAO_aero_growth_PHA, PAO_lysis, PP_lysis, PHA_lysis, auto_aero_growth, auto_lysis, precipitation, redissolution, anox_storage_PP, PAO_anox_growth])

References