Table 1.
Composition of selected digestates.
| Parameter | dA | dB | dC | HS |
|---|---|---|---|---|
| TS (g/L) | 94 ± 5 | 28 ± 3 | <0.1 | 2.1 ± 0.1 |
| TVS (g/L) | 65 ± 2 | 15 ± 3 | <0.1 | <LOD |
| COD (gCOD/L) | 74 ± 8 | 18 ± 4 | <0.1 | <LOD |
| Total Nitrogen (mgN/L) | 5218 ± 314 | 2750 ± 112 | 37 ± 6 | 113 ± 5 |
| VFA (acetic acid, mg/L) | <100 | <100 | <20 | <LOD |
| Ammonia (mgN/L) | 2949 ± 197 | 1450 ± 65 | 35 ± 5 | 113 ± 5 |
| Total Phosphorus (mgP/L) | 4870 ± 390 | 480 ± 44 | 6.5 ± 0.9 | 436 ± 15 |
| Orthophosphate (mgP/L) | 85 ± 25 | 30.5 ± 5.2 | 6.2 ± 0.8 | 436 ± 15 |
| CaCO3 (mg/L) | 13,020 ± 750 | 3780 ± 227 | 406 ± 54 | 360 ± 18 |
| pH | 8.2 ± 0.1 | 7.9 ± 0.2 | 7.6 ± 0.5 | 6.9 ± 0.1 |
| Conductivity (mS/cm) | 26 ± 3 | 5.4 ±0.9 | 0.4 ± 0.1 | 3.2 ± 0.1 |
| OD 440 nm (liquid phase) | 13,673 ± 0.05 | 0.459 ± 0.02 | 0.0137 ± 0.01 | 0.002 ± 0.01 |
| OD 680 nm (liquid phase) | 2340 ± 0.02 | 0.221 ± 0.01 | 0.007 ± 0.01 | 0.004 ± 0.01 |
TS: total solid content; TVS: total volatile solid content; COD: chemical oxygen demand; OD: optical density; LOD: limit of detection; VFA: volatile fatty acids.