Table 1 Effects of the different pH values on PQQ fermentation
pH | Time (h) | Biomass (g/L) | PQQ production (g/L) | PQQ yield (mg/g DCW) | PQQ productivity (mg/L × h) |
|---|---|---|---|---|---|
6.0 | 168 | 32.3 ± 1.23 | 0.908 ± 0.0195 | 28.1 ± 0.603 | 5.41 ± 0.116 |
6.5 | 168 | 39.6 ± 1.39 | 1.22 ± 0.0284 | 30.8 ± 0.717 | 7.26 ± 0.169 |
7.0 | 168 | 36.4 ± 2.11 | 1.42 ± 0.0481 | 39.0 ± 1.321 | 8.45 ± 0.286 |
7.5 | 168 | 29.4 ± 0.97 | 0.920 ± 0.0258 | 31.3 ± 0.878 | 5.48 ± 0.154 |
6.5–7.0 | 144 | 37.7 ± 1.26 | 1.52 ± 0.0348 | 40.3 ± 0.923 | 10.5 ± 0.242 |