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Table 5 Ethanol and co-product outputs associated with ethanol processing scenarios, assuming 86% dry grind with 50% skimming oil and 14% wet milling

From: Land usage attributed to corn ethanol production in the United States: sensitivity to technological advances in corn grain yield, ethanol conversion, and co-product utilization

  Ethanol yield, L/t (gal/bu) DDGS yield, kg/t (lb/bu)a CGF yield, kg/t (lb/bu)a CGM yield, kg/t (lb/bu)a Dry grind oil recovery, kg/t (lb/bu)
Baselineb 410.3 (2.759) 310.1 (17.44) 229.3 (12.88) 49.77 (2.80) 2.145 (0.12)
Individual processes:      
  Conventional dry grind, no oil skimming 414.1 (2.785) 312.2 (17.56) n/a n/a 0
  Conventional dry grind, with oil skimming 414.1 (2.785) 308.0 (17.32) n/a n/a 4.288 (0.24)
  Wet milling 386.6 (2.600) n/a 229.3 (12.88) 49.77 (2.80) n/a
Scenario 5: Full starch conversion 420.7 (2.829)# 291.2 (16.38) 229.3 (12.88) 49.77 (2.80) 2.145 (0.12)
Scenario 6: Complete fiber conversion plus full starch conversion 457.6 (3.078)# 226.3 (12.67) 229.3 (12.88) 49.77 (2.80) 2.145 (0.12)
  1. aCommercial or ‘as is’ basis. Dry matter contents of 89.31%, 87.13%, and 90.04% for DDGS, CGF and CGM, respectively[40]. bWeighted industry averages. DDGS, distillers dried grains with solubles; CGF, corn gluten feed; CGM, corn gluten meal.