Research Article
Improvement of D-Ribose Production from Corn Starch Hydrolysate by a Transketolase-Deficient Strain Bacillus subtilis UJS0717
Table 4
Effect of (NH4)2SO4 concentration on D-ribose production performance by B. subtilis UJS0717.
| | (NH4)2SO4 concentration (g/L) | Initial glucose
(g/L) | Residual glucose
(g/L) | Glucose consumption
rate (%) | Glucose consumption
rate (g/L·h) | Cell concentration
(g/L) | D-Ribose
(g/L) | D-Ribose yield
(g/g) | D-Ribose productivity
(g/L·h) |
| | 1.5 | 151.0 | 3.85 ± 0.14 | 97.45 ± 0.09 | 2.04 ± 0.00 | 9.40 ± 0.30 | 45.81 ± 1.23 | 0.31 ± 0.01 | 0.64 ± 0.01 | | 3.0 | 151.0 | 0.12 ± 0.01 | 99.92 ± 0.00 | 2.09 ± 0.00 | 10.77 ± 0.17 | 60.11 ± 0.12 | 0.40 ± 0.00 | 0.84 ± 0.01 | | 4.5 | 151.0 | 0.29 ± 0.01 | 99.81 ± 0.01 | 2.09 ± 0.00 | 10.65 ± 0.15 | 56.25 ± 0.67 | 0.37 ± 0.00 | 0.78 ± 0.01 | | 6.0 | 151.0 | 5.59 ± 0.21 | 96.30 ± 0.14 | 2.02 ± 0.00 | 9.15 ± 0.15 | 42.89 ± 0.17 | 0.29 ± 0.00 | 0.60 ± 0.00 | | 7.5 | 151.0 | 0.80 ± 0.14 | 99.47 ± 0.09 | 2.09 ± 0.00 | 10.55 ± 0.35 | 54.56 ± 0.30 | 0.36 ± 0.00 | 0.76 ± 0.00 | | 9.0 | 151.0 | 5.43 ± 0.04 | 96.40 ± 0.28 | 2.02 ± 0.00 | 9.25 ± 0.25 | 43.04 ± 0.64 | 0.30 ± 0.00 | 0.60 ± 0.00 |
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compared to (NH4)2SO4 concentration of 1.5 g/L group.
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