Digester | Operating parameters | NH4 +-N (g/L) | NH3 (g/L) | 14CO2/14CH4 ratio | Average pH | |
---|---|---|---|---|---|---|
Temperature (°C) | Trace element addition | |||||
D37 | 37 | – | 5.8 | 0.4–0.7 | 9.1 ± 2.4 | 7.9 ± 0.1 |
D42 | 42 | – | 5.6 | 0.6–1.5 | 20 ± 1.8 | 8.1 ± 0.2 |
DTE37 | 37 | + | 5.4 | 0.6–0.9 | 21 ± 5.1 | 8.1 ± 0.1 |
DTE42 | 42 | + | 5.4 | 0.8–1.2 | 14 ± 1.7 | 8.1 ± 0.1 |