Fermentation characteristics | Substrate | ||
---|---|---|---|
Corn | Cassava | Cassava + Neutral red | |
Number of experiments | 2 | 2 | 2 |
Fermentation time (h) | 100 | 100 | 100 |
Total butanol (g/L) | 33.26 ± 2.61 | 37.48 ± 3.11 | 42.60 ± 2.02 |
Total acetone (g/L) | 18.98 ± 1.39 | 13.06 ± 0.93 | 14.59 ± 0.60 |
Butanol/acetone ratio (−) | 1.75 ± 0.01 | 2.87 ± 0.03 | 2.92 ± 0.02 |
Acetate (g/L) | |||
Max. | 3.20 ± 0.60 | 2.94 ± 0.27 | 2.80 ± 0.03 |
Final | 1.40 ± 0.22 | 1.24 ± 0.34 | 1.60 ± 0.08 |
Butyrate (g/L) | |||
Max. | 2.58 ± 0.34 | 1.27 ± 0.16 | 1.44 ± 0.28 |
Final | 0.39 ± 0.06 | 0.41 ± 0.12 | 0.51 ± 0.15 |
Gas production (L/L-broth) | 80.00 ± 6.13 | 72.37 ± 5.37 | 64.86 ± 0.11 |
Butanol productivity (g/L/h) | 0.33 ± 0.02 | 0.37 ± 0.03 | 0.42 ± 0.02 |