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Table 4 List of pretreatment conditions of FS10 at 165°C using SPORL with and without pH profiling

From: High titer and yield ethanol production from undetoxified whole slurry of Douglas-fir forest residue using pH profiling in SPORL

Run label a

t T (min)

Initial pH

Sulfuric acid at t= 0 (wt.%)

Sodium bisulfite at t= 0 (wt.%)

t i (min)

Sulfuric acid at t i (wt.%)

Final pH

L/W (L/kg)

t0A4B12

75

1.79

2.2

12

0

0

1.45

3

t25A4B12

75

4.06

0

12

25

2.2

1.72

3

t35A4B12

75

4.06

0

12

35

2.2

1.40

3

t45A4B12

75

4.06

0

12

45

2.2

1.66

3

  1. atxx stands for acid injection time in min, A4 stands for 4 mL of sulfuric acid in 1 L of initial pretreatment solution, and B12 stands for 12 wt.% of sodium bisulfite charge on wood.