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Table 5 Contents of TOC in the mixture, degrees of TOC reduction, methane potentials and yields for the different substrates

From: Ethanol and biogas production after steam pretreatment of corn stover with or without the addition of sulphuric acid

Pretreatment Substrate TOC (g/l) TOC reduction (%) Methane potential (nl CH4/kg VS) Yield (nl CH4/100 g raw material)
  Reference with cellulose - - 390 -
No catalyst Hydrolysate 0.22 90.6 495 9.9
  Thin stillage from SSF with unwashed material 0.29 82.5 468 9.9
  Thin stillage from SSF with washed material 0.19 86.2 517 3.5
0.2% Sulphuric acid Hydrolysate 0.02 99.0 503 11.7
  Thin stillage from SSF with unwashed material 0.17 92.1 658 13.8
  Thin stillage from SSF with washed material 0.16 91.8 516 3.8
  1. All results have been corrected with the values obtained for the inoculum.