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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.