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Table 4 Fermentation of coffee silverskin hydrolysates with C. beijerinckii CECT 508 under optimal conditions (33.9 °C, pH 5.59 and 7.55 g/L CaCO3) after 96 h

From: Biobutanol production from coffee silverskin

ABE fermentation metabolites

 Acetone (g/L)

4.14 ± 0.21

 Butanol (g/L)

7.02 ± 0.27

 Ethanol (g/L)

0.25 ± 0.01

 Acetic acid (g/L)

2.42 ± 0.05

 Butyric acid (g/L)

0.57 ± 0.14

Sugar consumption

 Total sugars (%)

76.5 ± 0.8

Yield and productivity

 Y B/S (g/g)

0.269 ± 0.008

 WB [g/(L·h)]

0.073 ± 0.003