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Table 8 Variable operational costs and prices of products used in the calculations

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

  Cost/unit Units
Input
 Wheat strawa 0.09 EUR/kg DM
 Enzyme 3.00 EUR/106 FPU
 Acetic acidb 0.17 EUR/kg
 Phosphoric acid (50 wt%)b 0.56 EUR/kg
 (NH4)2HPO b4 0.67 EUR/kg
 MgCl b2 0.17 EUR/kg
 Ammonia (25 wt%)c 0.22 EUR/kg
 Antifoamd 2.22 EUR/kg
Utilities
 Process watere 0.16 EUR/kg
 Cooling watere 0.02 EUR/kg
Products
 Ethanol 0.67 EUR/L
 Biogas, rawf 33.00 EUR/MWh
 Biogas, upgraded to vehicle fuel qualityf 67.00 EUR/MWh
 Electricity (spot and certificate price)g 0.67 EUR/MWh
 Carbon dioxideh 0.003 EUR/kg
  1. aRef. [54]
  2. bRef. [55]
  3. cRef. [56]
  4. dRef. [57]
  5. eRef. [58]
  6. fRef. [59]
  7. gRef. [34]
  8. hRef. [60]
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