Table 1.
Model parameters used for acetic, propionic, and butyric acid as well as hydrogen converting populations
| Yield Y (gCODX gCOD−1S) | Maximum substrate utilization rate km (gCODS gCOD−1X day−1) | Half saturation constant K (gCODS L−1) | Decay rate kdec | pH inhibition | References | |
|---|---|---|---|---|---|---|
| Xac,1 | 0.033 | 20 | 0.32 | 0.02 | pH_l = 4; pH_u = 5.5 | This study |
| 0.060 | 8.95 | 0.32 | 0.1 | N/A | [26] | |
| Xac,2 | 0.033 | 14.5 | 0.09 | 0.02 | pH_l = 6.3; pH_u = 7 | This study |
| 0.042 | 2.77 | 0.09 | 0.0064 | N/A | [26] | |
| Xh2 | 0.032 | 35 | 7 × 10−6 | 0.02 | pH_l = 5; pH_u = 6 | This study |
| 0.060 | 35 | 1 × 10−6 | 0.02 | pH_l = 5; pH_u = 6 | [52] | |
| Xpro | 0.012 | 30 | 0.1 | 0.02 | N/A | This study |
| 0.040 | 13 | 0.1 | 0.02 | N/A | [52] | |
| XC4 | 0.012 | 25 | 0.2 | 0.02 | N/A | This study |
| 0.060 | 20 | 0.2 | 0.02 | N/A | [52] |
Xac,1 = Methanosarcina, Xac,2 = Methanosaeta, Xh2 = hydrogenotrophic methanogens, Xpro = propionic acid degraders, XC4 = butyric acid degraders, pH_l = lower limit and pH_u = upper limit for pH inhibition