| Xylose Batch | Glucose Fed-Batch | Glucose/Xylose Fed-Batch |
---|
qglucose [g/g CDW/h]a | Â | 0.79 | 0.65 |
qxylose [g/g CDW/h]a | 0.14 | Â | 0.30 - 0.19c |
Yethanol [g/g]b | 0.33 | 0.39 | 0.38 |
Yxylitol [g/g]b | 0.17 | Â | 0.05/0.19d |
Yglycerol [g/g]b | 0.038 | 0.070 | 0.029 |
Yacetate [g/g]b | 0.023 | <0.001 | <0.001 |
C-recovery [%] | 99 | 100 | 94 |
- a) Uptake rates were determined from data acquired in the first 20 h. S.D.s on uptake rates were < 10%.
- b) Yield coefficients (g/g sugar consumed) were calculated using data after a reaction time of 120 h (batch) or 20 h (fed batch). S.D.s were < 10% (except Yglycerol: < 20%). Yacetate in fed-batch reactions was too low for an S.D. to be determined.
- c) qxylose decreased over the initial 20 hours of fermentation (see also Figure 5B).
- d) Yield coefficients are based on either the sum of consumed glucose and xylose or on consumed xylose alone.