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Table 6 Cost of corn steep liquor and process water for use in cellulosic ethanol production

From: Replacing process water and nitrogen sources with biogas slurry during cellulosic ethanol production

  1a 2a 3a 3 ha 4a 4 ha 5 ha
Cost of corn steep liquor (cents/gal ethanol) 31.8 19.4 35.6 32.7 33.8 29.3 18.3
Process water (gal/gal ethanol) 16.5 10.1 8.2 7.5 3.2 2.7 5.1
Cost of process water (cents/gal ethanol) 110.06 67.37 54.69 50.03 21.34 18.01 34.02
Total cost of corn steep liquor and process water (cents/gal ethanol) 141.86 86.77 90.29 82.73 55.14 47.31 52.32
Minimum ethanol selling price (MESP) in dollars per gallon ($/gallon) 3.3 3.09 3.15 2.95 3.03 2.68 2.87
Total cost of corn steep liquor and process water in Minimum ethanol selling price (MESP) (%) 42.99 28.08 28.66 28.04 18.2 17.65 18.23
  1. Data from Ref. [17]
  2. Whole slurry coculture SSF (Simultaneous Saccharification and Fermentation); Separate xylose and glucose fermentation; 3, 3 h, 4, 4 h, 5 h, Separate solid and liquid processing dilution of solids with ethanol from xylose fermentation or water
  3. aDifferent technologies used for converting cellulosic material into ethanol