Table 1 Comparison of l-lactic acid fermentation characteristics based on simulated substrate and alkali-treated corn stalk (ATCS) hydrolysates
From: Co-generation of ethanol and l-lactic acid from corn stalk under a hybrid process
Culture | Initial ethanol concentration (g L−1) | Aeration time (h) | Cell density (OD620) | l-Lactic acid titer (g L−1) | l-Lactic acid yield (g g−1) | l-Lactic acid productivity (g L−1 h−1) |
|---|---|---|---|---|---|---|
Simulated substrate | 30.00 | 5.00 | 8.20 | 21.50 | 0.79 | 2.05 |
40.00 | 5.33 | 8.00 | 22.10 | 0.81 | 2.01 | |
50.00 | 6.00 | 8.80 | 21.00 | 0.77 | 2.33 | |
60.00 | 7.00 | 6.90 | 22.80 | 0.84 | 1.63 | |
ATCS hydrolysates | 50.50 | 8.00 | 8.80 | 21.50 | 0.76 | 2.08 |
50.30 | 6.50 | 6.90 | 24.25 | 0.86 | 1.96 |