Table 1 Enrichment conditions based on initial pH and initial addition of acetate
Enrichment series | Inoculum treatment | Initial pH | Syngas composition (%H2, %CO, %CO2) | Co-substrate | YE (g/l) |
|---|---|---|---|---|---|
HT6 | Heat-shock | 5.95 ± 0.06 | 50%, 22.2%, 27.8% | – | – |
HT5.5 | Heat-shock | 5.51 ± 0.09 | 50%, 22.2%, 27.8% | – | – |
HT5 | Heat-shock | 5.05 ± 0.02 | 50%, 22.2%, 27.8% | – | – |
HT5.5YE | Heat-shock | 5.43 ± 0.13 | 50%, 22.2%, 27.8% | – | 0.5 |
HT5YE | Heat-shock | 5.02 ± 0.10 | 50%, 22.2%, 27.8% | – | 0.5 |
NT5YE | Non-treated | 5.04 ± 0.13 | 50%, 22.2%, 27.8% | – | 0.5 |
HT5YE-Ac | Heat-shock | 4.99 ± 0.08 | 50%, 22.2%, 27.8% | NaCH3COO (20 mM) | 0.5 |