Phototrophic Mixotrophic Process Model (PM2)

class qsdsan.processes.PM2(components=None, a_c=0.049, I_n=250, arr_a=18000000000.0, arr_e=6842, beta_1=2.9, beta_2=3.5, b_reactor=0.03, I_opt=300, k_gamma=1e-05, K_N=0.1, K_P=1.0, K_A=6.3, K_F=6.3, rho=1.186, K_STO=1.566, f_CH_max=0.819, f_LI_max=3.249, m_ATP=15.835, mu_max=1.969, q_CH=0.594, q_LI=0.91, Q_N_max=0.417, Q_N_min=0.082, Q_P_max=0.092, Q_P_min=0.0163, V_NH=0.254, V_NO=0.254, V_P=0.016, exponent=4, Y_ATP_PHO=55.073, Y_CH_PHO=0.754, Y_LI_PHO=0.901, Y_X_ALG_PHO=0.45, Y_ATP_HET_ACE=39.623, Y_CH_NR_HET_ACE=0.625, Y_CH_ND_HET_ACE=0.6, Y_LI_NR_HET_ACE=1.105, Y_LI_ND_HET_ACE=0.713, Y_X_ALG_HET_ACE=0.216, Y_ATP_HET_GLU=58.114, Y_CH_NR_HET_GLU=0.917, Y_CH_ND_HET_GLU=0.88, Y_LI_NR_HET_GLU=1.62, Y_LI_ND_HET_GLU=1.046, Y_X_ALG_HET_GLU=0.317, n_dark=0.7, path=None, **kwargs)

Parameters:

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

• a_c (float, optional) – PAR absorption coefficient on a TSS (total suspended solids) basis, in [m^2/g TSS]. The default is 0.049.

• I_n (float, optional) – Maximum incident PAR irradiance (“irradiance at noon”), in [uE/m^2/s]. The default is 250.

• arr_a (float, optional) – Arrhenius constant (A), in [unitless]. The default is 1.8 * 10**10.

• arr_e (float, optional) – Arrhenius exponential constant (E/R), in [K]. The default is 6842.

• beta_1 (float, optional) – Power coefficient for carbohydrate storage inhibition, in [unitless]. The default is 2.90.

• beta_2 (float, optional) – Power coefficient for lipid storage inhibition, in [unitless]. The default is 3.50.

• b_reactor (float, optional) – Thickness of reactor along light path, in [m]. The default is 0.03.

• I_opt (float, optional) – Optimal irradiance, in [uE/m^2/s]. The default is 300.

• k_gamma (float, optional) – Photoadaptation coefficient, in [unitless]. The default is 0.00001.

• K_N (float, optional) – Nitrogen half-saturation constant, in [g N/m^3]. The default is 0.1.

• K_P (float, optional) – Phosphorus half-saturation constant, in [g P/m^3]. The default is 1.0.

• K_A (float, optional) – Organic carbon half-saturation constant (acetate) (Wagner, 2016), in [g COD/m^3]. The default is 6.3.

• K_F (float, optional) – Organic carbon half-saturation constant (glucose); assumes K_A = K_F, in [g COD/m^3]. The default is 6.3.

• rho (float, optional) – Carbohydrate relative preference factor (calibrated in Guest et al., 2013), in [unitless]. The default is 1.186.

• K_STO (float, optional) – Half-saturation constant for stored organic carbon (calibrated in Guest et al., 2013), in [g COD/g COD]. The default is 1.566.

• f_CH_max (float, optional) – Maximum achievable ratio of stored carbohydrates to functional cells, in [g COD/g COD]. The default is 0.819.

• f_LI_max (float, optional) – Maximum achievable ratio of stored lipids to functional cells, in [g COD/g COD]. The default is 3.249.

• m_ATP (float, optional) – Specific maintenance rate, in [g ATP/g COD/d]. The default is 15.835.

• mu_max (float, optional) – Maximum specific growth rate, in [d^(-1)]. The default is 1.969.

• q_CH (float, optional) – Maximum specific carbohydrate storage rate, in [g COD/g COD/d]. The default is 0.594.

• q_LI (float, optional) – Maximum specific lipid storage rate, in [g COD/g COD/d]. The default is 0.910.

• Q_N_max (float, optional) – Maximum nitrogen quota, in [g N/g COD]. The default is 0.417.

• Q_N_min (float, optional) – Nitrogen subsistence quota, in [g N/g COD]. The default is 0.082.

• Q_P_max (float, optional) – Maximum phosphorus quota, in [g P/g COD]. The default is 0.092.

• Q_P_min (float, optional) – Phosphorus subsistence quota; assumes N:P ratio of 5:1, in [g P/g COD]. The default is 0.0163.

• V_NH (float, optional) – Maximum specific ammonium uptake rate (calibrated in Guest et al., 2013), in [g N/g COD/d]. The default is 0.254.

• V_NO (float, optional) – Maximum specific nitrate uptake rate (calibrated in Guest et al., 2013), in [g N/g COD/d]. The default is 0.254.

• V_P (float, optional) – Maximum specific phosphorus uptake rate (calibrated in Guest et al., 2013), in [g P/g COD/d]. The default is 0.016.

• exponent (float, optional) – Exponent to allow for more rapid transitions from growth to storage (see Guest et al., 2013), in [unitless] The default is 4.

• Y_ATP_PHO (float, optional) – Yield of ATP on CO2 fixed to G3P, in [g ATP/g CO2]. The default is 55.073.

• Y_CH_PHO (float, optional) – Yield of storage carbohydrate (as polyglucose, PG) on CO2 fixed to G3P, in [g COD/g CO2]. The default is 0.754.

• Y_LI_PHO (float, optional) – Yield of storage lipids (as triacylglycerol, TAG) on CO2 fixed to G3P, in [g COD/g CO2]. The default is 0.901.

• Y_X_ALG_PHO (float, optional) – Yield of carbon-accumulating phototrophic organisms on CO2 fixed to G3P, in [g COD/g CO2]. The default is 0.450.

• Y_ATP_HET_ACE (float, optional) – Yield of ATP on acetate fixed to acetyl-CoA, in [g ATP/g COD]. The default is 39.623.

• Y_CH_NR_HET_ACE (float, optional) – Yield of storage carbohydrates (as polyglucose, PG) on acetate fixed to acetyl-CoA under nutrient-replete condition, in [g COD/g COD]. The default is 0.625.

• Y_CH_ND_HET_ACE (float, optional) – Yield of storage carbohydrates (as polyglucose, PG) on acetate fixed to acetyl-CoA under nutrient-deplete condition, in [g COD/g COD]. The default is 0.600.

• Y_LI_NR_HET_ACE (float, optional) – Yield of storage lipids (as triacylglycerol, TAG) on acetate fixed to acetyl-CoA under nutrient-replete condition, in [g COD/g COD]. The default is 1.105.

• Y_LI_ND_HET_ACE (float, optional) – Yield of storage lipids (as triacylglycerol, TAG) on acetate fixed to acetyl-CoA under nutrient-deplete condition, in [g COD/g COD]. The default is 0.713.

• Y_X_ALG_HET_ACE (float, optional) – Yield of carbon-accumulating phototrophic organisms on acetate fixed to acetyl-CoA, in [g COD/g COD]. The default is 0.216.

• Y_ATP_HET_GLU (float, optional) – Yield of ATP on glucose fixed to G6P, in [g ATP/g COD]. The default is 58.114.

• Y_CH_NR_HET_GLU (float, optional) – Yield of storage carbohydrates (as polyglucose, PG) on glucose fixed to G6P under nutrient-replete condition, in [g COD/g COD]. The default is 0.917.

• Y_CH_ND_HET_GLU (float, optional) – Yield of storage carbohydrates (as polyglucose, PG) on glucose fixed to G6P under nutrient-deplete condition, in [g COD/g COD]. The default is 0.880.

• Y_LI_NR_HET_GLU (float, optional) – Yield of storage lipids (as triacylglycerol, TAG) on glucose fixed to G6P under nutrient-replete condition, in [g COD/g COD]. The default is 1.620.

• Y_LI_ND_HET_GLU (float, optional) – Yield of storage lipids (as triacylglycerol, TAG) on glucose fixed to G6P under nutrient-deplete condition, in [g COD/g COD]. The default is 1.046.

• Y_X_ALG_HET_GLU (float, optional) – Yield of carbon-accumulating phototrophic organisms on glucose fixed to G6P, in [g COD/g COD]. The default is 0.317.

• n_dark (float, optional) – Dark growth reduction factor, in [unitless] The default is 0.7.

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

Examples

>>> from qsdsan import processes as pc
>>> cmps = pc.create_pm2_cmps()
>>> pm2 = pc.PM2()
>>> pm2.show()
PM2([photoadaptation, ammonium_uptake, nitrate_uptake_pho, nitrate_uptake_ace, nitrate_uptake_glu, phosphorus_uptake,
     growth_pho, carbohydrate_storage_pho, lipid_storage_pho, carbohydrate_growth_pho, lipid_growth_pho,
     carbohydrate_maintenance_pho, lipid_maintenance_pho, endogenous_respiration_pho,
     growth_ace, carbohydrate_storage_ace, lipid_storage_ace, carbohydrate_growth_ace, lipid_growth_ace,
     carbohydrate_maintenance_ace, lipid_maintenance_ace, endogenous_respiration_ace,
     growth_glu, carbohydrate_storage_glu, lipid_storage_glu, carbohydrate_growth_glu, lipid_growth_glu,
     carbohydrate_maintenance_glu, lipid_maintenance_glu, endogenous_respiration_glu])

set_parameters(**parameters)

Set values to stoichiometric and/or kinetic parameters.