Table 1 The experimental results in the first stage continuous fermentations

0.222

0.237

5.81 ± 1.19

4.17 ± 0.17

42.94 ± 0.71

6.65 ± 0.18

4.83 ± 0.08

1.67 ± 0.04

0.99

10.18

0.256

0.269

13.43 ± 1.46

4.04 ± 0.13

38.89 ± 0.70

6.35 ± 0.34

4.32 ± 0.24

2.18 ± 0.31

1.09

10.46

0.279

0.294

15.38 ± 1.18

3.75 ± 0.16

37.59 ± 0.95

5.58 ± 0.24

4.88 ± 0.12

1.76 ± 0.07

1.10

11.05

0.321

0.338

21.69 ± 2.17

3.66 ± 0.15

34.82 ± 1.06

5.06 ± 0.24

4.49 ± 0.13

1.67 ± 0.07

1.24

11.77

0.200

0.216

4.60 ± 1.22

4.15 ± 0.10

45.93 ± 0.27

7.50 ± 0.84

4.98 ± 0.77

1.30 ± 0.13

0.90

9.83

0.211

0.230

14.22 ± 0.58

4.04 ± 0.17

41.73 ± 0.87

6.64 ± 0.22

5.77 ± 0.09

0.98 ± 0.03

0.93

9.43

0.232

0.247

19.86 ± 1.01

3.66 ± 0.15

39.06 ± 0.52

5.95 ± 0.09

5.48 ± 0.07

0.93 ± 0.03

0.90

9.65

0.253

0.268

25.80 ± 1.01

3.49 ± 0.01

36.41 ± 0.50

5.34 ± 0.08

5.02 ± 0.08

0.92 ± 0.02

0.94

9.76

0.274

0.289

32.16 ± 2.11

3.16 ± 0.06

33.57 ± 0.18

4.71 ± 0.09

4.61 ± 0.09

0.74 ± 0.05

0.91

9.70

0.148

0.160

3.29 ± 0.60

4.25 ± 0.21

50.85 ± 0.45

9.59 ± 0.23

5.67 ± 0.17

2.34 ± 0.04

0.68

8.14

0.167

0.180

7.29 ± 5.71

4.82 ± 0.37

48.37 ± 2.52

9.95 ± 2.30

4.20 ± 1.43

2.40 ± 0.38

0.87

8.71

0.173

0.185

14.38 ± 2.16

3.73 ± 0.21

46.30 ± 0.86

7.30 ± 0.44

6.59 ± 0.24

1.65 ± 0.17

0.69

8.56

0.200

0.212

26.17 ± 1.88

3.40 ± 0.09

41.42 ± 0.83

6.27 ± 0.15

5.85 ± 0.25

1.36 ± 0.07

0.72

8.78

0.143

0.154

17.91 ± 1.43

4.26 ± 0.27

53.82 ± 0.71

12.39 ± 0.72

3.87 ± 0.34

2.25 ± 0.35

0.66

8.29