Experiment ID | FM50 | FM51 | FM38 | FM39 |
---|---|---|---|---|
Limiting condition | Oxygen limited | Oxygen limited | Methane limited | Methane limited |
Total FAME (% cell dry weight) | 10.5 | 10.7 | 10.2 | 10.5 |
Dilution rate (h−1) | 0.119 | 0.122 | 0.122 | 0.126 |
Cell density (gCDW L−1) | 0.79 | 0.77 | 0.45 | 0.46 |
Dissolved oxygen (% of saturation) | 1 | 1 | 92 | 92 |
Oxygen uptake (mmol h−1) | 8.8 | 9.5 | 6.2 | 5.9 |
Methane uptake (mmol h−1) | 7.7 | 8.2 | 3.8 | 3.6 |
Specific oxygen uptake (mmol gCDW−1 h−1) | 11.1 | 12.3 | 13.7 | 12.8 |
Specific methane uptake (mmol gCDW−1 h−1) | 9.7 | 10.6 | 8.4 | 7.8 |
O2/CH4 uptake ratio | 1.1 | 1.2 | 1.6 | 1.6 |
Carbon conversion efficiency (%) | 46 | 43 | 54 | 61 |
Excreted products | ||||
 Formate (μmol gCDW−1) | 286 | 301 | 255 | 459 |
 Acetate (μmol gCDW−1) | 36 | 85 | 32 | 28 |
 Lactate (μmol gCDW−1) | 24 | 28 | 47 | 21 |
Glycogen content (% CDW) | 7.2 ± 1.9 | 13.1 ± 4.0 | 6.0 ± 0.5 | 8.1 ± 2.5 |
Inlet gas composition | 20Â % CH4, 5Â % O2, 75Â % N2 | 20Â % CH4, 5Â % O2, 75Â % N2 | 2.5Â % CH4, 97.5Â % Air | 2.5Â % CH4, 97.5Â % Air |