Table 1 Comparison of butyrate production and extraction efficiency in batch fermentation
| Batch fermentation | |||
|---|---|---|---|
| Control | Liquid–liquid extraction under 50 bar pCO2 | ||
| Without the recovery of butyl butyrate from the aqueous phase | With the recovery of butyl butyrate from the aqueous phase | ||
| Butyric acid production (g) | 27.4 | 36.5 | 45.1 |
| Extraction efficiency (%) | – | 62.1 | 57.8 |
| Butyric acid productivity (g/L h) | 2.30 | 3.39 | 3.99 |
| Y (g butyric acid/g glucose) | 0.38 | 0.30 | 0.38 |