Table 3 Changes of different parameters during fermentation in 5 L fermenter of BL Δupp and BL ΔF
Time/h | BL Δupp | BL ΔF | ||||||
|---|---|---|---|---|---|---|---|---|
VC/cfu/mL | DO2/% | pH | RS/% | VC/cfu/mL | DO2/% | pH | RS/% | |
0 | 5.71 × 104 | 90 | 7.28 | 23.67 | 6.33 × 104 | 90 | 7.26 | 24.18 |
12 | 4.95 × 108 | 53.4 | 7.13 | 19.70 | 5.86 × 108 | 50.7 | 7.16 | 20.03 |
24 | 1.23 × 1010 | 32.0 | 6.97 | 16.76 | 1.44 × 1010 | 33.6 | 7.23 | 16.85 |
36 | 1.87 × 1010 | 37.9 | 7.11 | 16.64 | 2.09 × 1010 | 34.9 | 7.19 | 16.54 |
48 | 3.62 × 1010 | 35.7 | 7.10 | 15.89 | 3.13 × 1010 | 36.3 | 7.15 | 16.16 |
60 | 3.47 × 1010 | 36.1 | 7.17 | 16.12 | 2.95 × 1010 | 35.5 | 7.19 | 17.04 |
72 | 1.96 × 1010 | 37.4 | 7.09 | 16.06 | 2.46 × 1010 | 36.2 | 7.11 | 16.51 |