Table 1.
Growth parameters and substrate consumption in continuous bioreactor cultures of M. alcaliphilum 20ZR supplemented with Ca or La.
| Growth parameters | Ca | La | ||
|---|---|---|---|---|
| 5%CH4 : 5% O2 | 2.5%CH4 : 10%O2 | 5%CH4 : 5% O2 | 2.5%CH4 : 10%O2 | |
| Dilution rate∗ (h-1) | 0.05 | 0.05 | 0.07 | 0.06 |
| Biomass∗ (g DCW L-1) | 0.64 ± 0.01 | 0.67 ± 0.02 | 0.75 ± 0.05 | 0.45 ± 0.02 |
| Biomass yield (g biomass g-1 CH4 consumed) | 1.2 ± 0.1 | 0.98 ± 0.04 | 0.64 ± 0.01 | 0.67 ± 0.03 |
| O2:CH4 consumption ratio | 1.12 ± 0.09 | NT | 1.28 ± 0.01 | NT |
| CH4 consumption (mmol g-1 DCW h1) | 2.59 ± 0.26 | 3.11 ± 0.11 | 6.75 ± 0.09 | 5.55 ± 0.2 |
| Biomass produced (mg DCW h-1) | 31.8 ± 0.5 | 33.7 ± 1.02 | 53.1 ± 0.7 | 28.7 ± 1.1 |
NT: not tested; ∗dilution rate or cell concentration at steady-state.