Table 3 Effects of inoculation OD, nutrients, initial pH, pre-hydrolysis time, and temperature on glycerol, acetic acid, and ethanol production in the SSF process of washed SECS and whole slurry by Saccharomyces cerevisiae

1.0

1.21 (0.04)

2.34 (0.08)

27.3 (0.7)

1.45 (0.06)

3.01 (0.09)

26.2 (0.7)

4.0

1.25 (0.04)

2.72 (0.06)

28.6 (0.8)

1.37 (0.05)

3.56 (0.08)

27.7 (0.9)

8.0

1.51 (0.06)

2.83 (0.04)

26.7 (0.8)

1.74 (0.04)

4.28 (0.04)

24.6 (0.8)

0%

1.17 (0.05)

1.96 (0.05)

26.4 (0.6)

1.29 (0.04)

3.05 (0.05)

27.1 (0.6)

50%

1.25 (0.04)

2.72 (0.06)

28.6 (0.8)

1.37 (0.05)

3.56 (0.08)

27.7 (0.9)

100%

1.62 (0.03)

2.48 (0.09)

25.7 (1.1)

1.91 (0.04)

4.34 (0.07)

25.1 (1.0)

4.0

0.84 (0.07)

1.94 (0.05)

25.3 (0.3)

1.32 (0.07)

3.03 (0.06)

26.2 (0.6)

4.8

1.25 (0.04)

2.72 (0.06)

28.6 (0.8)

1.37 (0.05)

3.56 (0.08)

27.7 (0.9)

5.5

1.61 (0.03)

2.86 (0.08)

25.4 (0.7)

1.87 (0.08)

4.01 (0.09)

24.8 (1.2)

24 hours

1.08 (0.06)

2.77 (0.09)

25.5 (0.7)

1.23 (0.07)

3.64 (0.06)

24.9 (0.7)

36 hours

1.25 (0.04)

2.72 (0.06)

28.6 (0.8)

1.37 (0.05)

3.56 (0.08)

27.7 (0.9)

48 hours

1.56 (0.04)

2.32 (0.05)

27.6 (0.5)

1.71 (0.04)

3.34 (0.05)

25.9 (0.6)

30°C

1.12 (0.06)

3.01 (0.08)

25.8 (0.8)

1.23 (0.03)

4.28 (0.09)

24.9 (0.4)

33°C

1.31 (0.04)

3.21 (0.06)

27.5 (1.2)

1.46 (0.06)

4.52 (0.06)

26.5 (0.5)

36°C

1.25 (0.04)

2.72 (0.03)

28.6 (0.8)

1.37 (0.05)

3.56 (0.08)

27.7 (0.9)

39°C

1.64 (0.07)

2.52 (0.06)

33.1 (0.6)

1.73 (0.07)

3.04 (0.07)

32.1 (0.8)

42°C

1.55 (0.03)

2.24 (0.07)

31.5 (1.3)

1.69 (0.09)

3.01 (0.05)

30.2 (1.0)