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Table 2 Comparisons of yields (per kg of FS-10) of key wood components in the recovered solids and liquid hydrolysate from SPORL pretreatments at 165°C for 75 min 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

  Washed solids (g) Pretreatment hydrolysate (spent liquor) (g) (only monomeric sugars were reported)  
Pretreated sample a Glucan Xylan Mannan K lignin Solids yields b Glucose as glucan Xylose as xylan Mannose as mannan K lignin c Furfural as pentosan HMF as hexosan Yield d Total yield
t0A4B12 388.4 13.7 15.8 170.6 612.7 21.8 17.7 54.6 120.3 5.0 9.3 228.7 841.4
t25A4B12 405.6 22.7 23.7 130.1 603.9 10.0 13.5 32.8 160.8 2.2 4.0 222.9 826.8
t35A4B12 410.7 20.4 21.8 137.7 616.5 15.7 15.1 38.2 153.2 2.0 3.8 228.0 844.5
t45A4B12 406.5 21.0 25.7 131.9 622.3 9.1 14.2 30.9 159.0 2.0 2.9 218.1 840.4
  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.
  2. bAs measured after disk milling.
  3. cBased on balance of lignin.
  4. dSum of listed pretreatment hydrolysate components.