Table 4.
Physiological parameters of strains BP10001, IBB10A02 and IBB10B05 obtained from mixed glucose-xylose fermentation in 15% hydrolyzate
| Parameter | BP10001 | IBB10A02 | IBB10B05 |
|---|---|---|---|
|
qGlucose (g/gCDW/h)a1 |
2.81 ± 0.04 |
1.71 ± 0.05 |
2.90 ± 0.22 |
|
qXylose (g/gCDW/h) |
0.02 ± 0.01 |
0.23 ± 0.01 |
0.35 ± 0.02 |
| μmaxa2 |
0.10 ± 0.01 |
0.10 ± 0.01 |
0.19 ± 0.01 |
|
YEthanol (g/g) |
0.40 |
0.39 |
0.39 |
| (YEthanol/available sugars (g/g))b |
(0.13) |
(0.38) |
(0.38) |
|
YGlycerol (g/g) |
0.10 |
0.08 |
0.08 |
|
YXylitol (g/g) |
0.04 |
0.08 |
0.08 |
|
YAcetate (g/g) |
0.04 |
0.04 |
0.04 |
|
YBM (g/g) |
0.05 |
0.04 |
0.06 |
| C-recovery (%) | 103 ± 1 | 101 ± 1 | 104 ± 1 |
Data was obtained from two independent fermentations, mean errors of product coefficients were always below 14%. Fermentation time courses are shown in Figure 3. Fermentation in 15% hydrolyzate: glucose to xylose ratio of approximately 2.a Determined in the first a1 3.5 h and a2 6 hours of fermentation;bYEthanol/available sugars = c (Ethanol produced in 50 h of fermentation)/c (Available glucose and xylose).