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Table 1 Comparison of butyrate production and extraction efficiency in batch fermentation

From: Enhanced extraction of butyric acid under high-pressure CO2 conditions to integrate chemical catalysis for value-added chemicals and biofuels

  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