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Table 5 The mass and energy flows for the nine configurations

From: Combined production of biogas and ethanol at high solids loading from wheat straw impregnated with acetic acid: experimental study and techno-economic evaluation

  C10–96 C12.5–96 C15–96 C17.5–96 C20–96 C20–120 C20–144 C20–168 C20–192
Input
 Raw material
  Tonne/h 25 25 25 25 25 25 25 25 25
  MW 136 136 136 136 136 136 136 136 136
 Molasses
  Tonne/h 1.4 1.1 0.9 0.7 0.7 0.7 0.7 0.7 0.7
  MW 2.8 2.2 1.7 1.4 1.3 1.3 1.3 1.3 1.3
 Enzymes
  Tonne/h 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
  MW 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4
 Electricity external
  MW 0.5 0.7 0.6 0.5 0.9 1.0 1.0 1.1 1.2
 Harvesting and transportation
  MW 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4
 Water
  Tonne/h 221 203 195 194 184 184 184 184 184
  MW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Products
 Ethanol
  Tonne/h 4.7 4.7 4.7 4.6 4.8 4.8 4.8 4.8 4.8
  MW 28 28 27 27 28 28 28 28 28
 Methane
  Tonne/h 3.4 3.4 3.4 3.4 3.3 3.3 3.3 3.3 3.3
  MW 47 47 47 47 46 46 46 46 46
 Solid fuel (pellet dry)
  Tonne/h 4.1 4.5 4.8 4.9 5.1 5.1 5.1 5.1 5.1
  MW 24 26 28 28 30 30 30 30 30
 Electricity produced
  MW 3.3 2.8 2.6 2.6 2.2 2.2 2.2 2.2 2.2
 Carbon dioxide
  Tonne/h 4.1 4.1 3.9 3.8 3.9 3.9 3.9 3.9 3.9
  MW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0