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Table 1 Mass-balance analyses of Avicel and switchgrass fermentations

From: The effect of switchgrass loadings on feedstock solubilization and biofuel production by Clostridium thermocellum

Condition Initial substrate/ biomass (mg) Residual substrate/biomass + cell dry weight (mg) Soluble glucose and xylose equivalents recovered (mg) Fermentation products recovered (mg)a Carbon recovery (%) Final pH
3.5 g/L Avicel 175.0 13.8 ± 1.1 5.0 ± 0.1 90.4 ± 2.9 62.4 ± 2.8 7.0 ± 0.0
8.8 g/L Avicel 440.0 30.7 ± 0.6 4.1 ± 0.3 225.1 ± 10.6 59.1 ± 2.8 6.8 ± 0.0
17.5 g/L Avicel 875.0 44.9 ± 1.3 1.5 ± 0.1 548.0 ± 6.1 67.9 ± 2.4 6.0 ± 0.0
10 g/L SG 500.0 297.9 ± 12.0 124.1 ± 16.2 71.0 ± 7.3 98.6 ± 8.9 7.1 ± 0.0
25 g/L SG 1250.0 811.1 ± 7.7 179.2 ± 14.0 150.8 ± 2.2 91.3 ± 3.1 6.8 ± 0.0
50 g/L SG 2500.0 1768.8 ± 10.7 285.6 ± 11.3 223.3 ± 11.6 91.1 ± 2.9 6.6 ± 0.0
  1. Values are averages (n = 3) ± SD
  2. SG switchgrass
  3. aSum total of net acetate, lactate, formate, ethanol, and CO2 production. CO2 was estimated based on the formula: CO2 = acetate + ethanol—formate