Table 1. Kinetic parameters of ethanol production from sweet sorghum juice containing various yeast extract concentrations by S. cerevisiae NP 01 in 500-ml Erlenmeyer flasks. |
Yeast extract concentration (g l-1) |
Parameters (mean ± SD)* |
|||
P (g l-1) |
Qp (g l-1h-1) |
Yp/s (g g-1) |
t (hrs) |
|
0 (control) |
113.76 ± 0.22a |
2.84 ± 0.01a |
0.51 ± 0.00b |
40 |
3 |
113.21 ± 0.10 a |
2.83 ± 0.01a |
0.50 ± 0.00c |
40 |
6 |
116.21 ± 1.02b |
2.91 ± 0.10a,b |
0.49 ± 0.01a |
40 |
9 |
120.24 ± 1.35c |
3.01 ± 0.08b |
0.49 ± 0.00a |
40 |
*P: ethanol
concentration, Qp: ethanol productivity, Yp/s:
ethanol yield and t: fermentation time. The experiments were performed
in duplicate. |
|