Table 6 Parameters used in ADM1 simulations in the batch reactor [29, 62,63,64]
Parameter | Expression | Value | Unit |
|---|---|---|---|
Cac | Carbon content of acetate | 0.0313 | kmol C (kg COD)−1 |
CCH4 | Carbon content of methane | 0.0156 | kmol C (kg COD)−1 |
Ka,ac | Acid dissociation constant of acetate | 1.738∙10–5 | mol L−1 |
Ka,CO2 | Acid dissociation constant of CO2 at temperature 303 K | 4.700∙10–7 | mol L−1 |
kA/Bac | Acid–base kinetic constant of acetate | 1∙1010 | L mol−1 d−1 |
kA/Bco2 | Acid–base kinetic constant of CO2 | 1∙1010 | L mol−1 d−1 |
kdec,Xac | First-order decay rate | 0.0200–0.0400 | d−1 |
KH,CH4 | Henry’s law coefficient of CH4 at temperature 303 K | 0.0013 | mol L−1 bar−1 |
KH,CO2 | Henry’s law coefficient of CO2 at temperature 303 K | 0.0308 | mol L−1 bar−1 |
kLa | Overall gas–liquid mass transfer coefficient | 200* | d−1 |
km,ac | Monod maximum specific uptake rate for acetate | 4.100–7.800 | kg COD kg COD −1 d−1 |
KS,ac | Half-saturation value for acetate | 0.0500–0.600 | kg COD m−3 |
Kw | Ion constant for water | 1.450∙10–14 | mol L−1 |
R | Ideal gas constant | 0.0831 | bar L mol−1 K−1 |
Tbase | Absolute temperature in standard condition | 298.15 | K |
Top | Absolute temperature in digester | 303.15 | K |
Yac | Yield of biomass on acetate | 0.0500 | – |