class ASM3 {

  kin_params = {
    // Kinetic parameters (20 C for now)

    // Hydrolysis
    k_H:      3.,   // hydrolysis rate constant       [g X_S g-1 X_H d-1]
    K_x:      1.,   // hydrolysis saturation constant [g X_S g-1 X_H] 
    // Heterotrophs
    k_STO:    5.,   // storage rate constant          [g S_S g-1 X_H d-1]
    nu_NO:    0.6,  // anoxic reduction factor        [-]
    K_O:      0.2,  // saturation constant S_0        [g O2 m-3]
    K_NO:     0.5,  // saturation constant S_NO       [g NO3-N m-3]
    K_S:      2.,   // saturation constant S_s        [g COD m-3]
    K_STO:    1.,   // saturation constant X_STO      [g X_STO g-1 X_H]
    mu_H_max: 2.,   // maximum specific growth rate   [d-1]
    K_NH:     0.01, // saturation constant S_NH3      [g NH3-N m-3]
    K_HCO:    0.1,  // saturation constant S_HCO      [mole HCO3 m-3]
    b_H_O2:   0.2,  // aerobic respiration rate       [d-1]
    b_H_NO:   0.1,  // anoxic respiration rate        [d-1]
    b_STO_O2: 0.2,  // aerobic respitation rate X_STO [d-1]
    b_STO_NO: 0.1,  // anoxic respitation rate X_STO  [d-1]
    // Autotrophs
    mu_A_max: 1.0,  // maximum specific growth rate   [d-1]
    K_A_NH:   1.,   // saturation constant S_NH3      [g NH3-N m-3] 
    K_A_O:    0.5,  // saturation constant S_0        [g O2 m-3]
    K_A_HCO:  0.5,  // saturation constant S_HCO      [mole HCO3 m-3]
    b_A_O2:   0.15, // aerobic respiration rate       [d-1]
    b_A_NO:   0.05  // anoxic respiration rate        [d-1]
  }

  stoi_params = {
    // Stoichiometric and composition parameters

    f_S_I:    0.,   // fraction S_I from hydrolysis   [g S_I g-1 X_S]
    // Yields
    Y_STO_O:  0.85, // Aerobic yield X_STO per S_S    [g X_STO g-1 S_S]
    Y_STO_NO: 0.80, // Anoxic yield X_STO per S_S     [g X_STO g-1 S_S]
    Y_H_O:    0.63, // Aerobic yield X_H per X_STO    [g X_H g-1 X_STO]
    Y_H_NO:   0.54, // Anoxic yield X_H per X_STO     [g X_H g-1 X_STO]
    Y_A:      0.24, // anoxic yield X_A per S_NO      [g X_A g-1 NO3-N]
    // Composition (nitrogen)
    i_NSI:    0.01, // nitrogen content S_I           [g N g-1 S_I]
    i_NSS:    0.03, // nitrogen content S_S           [g N g-1 S_S]
    i_NXI:    0.02, // nitrogen content X_I           [g N g-1 X_I]
    i_NXS:    0.04, // nitrogen content X_S           [g N g-1 X_S]
    i_NBM:    0.07, // nitrogen content X_H / X_A     [g N g-1 X_H / X_A]
    // Composition (TSS)
    i_TS:     0.75, // TSS content X_I                [g TS g-1 X_I]
    i_TS:     0.75, // TSS content X_S                [g TS g-1 X_S]
    i_TS:     0.90, // TSS content X_H / X_A          [g TS g-1 X_H / X_A]
    i_TS:     0.60  // TSS content X_STO (PHB based)  [g TS g-1 X_STO]
  }

  constructor() {
  }

  compute_rates(state) {
    const rates = new Array(12);
    rates[0] = this.parameters[]
    return rates;
  }
}