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Table 1 Summary of LCA studies of sweet sorghum biofuels

From: Life cycle impact assessment of biofuels derived from sweet sorghum in the U.S.

LCA study Sorghum feedstock Biofuel conversion pathway Co-products Bagasse handling Functional unit Reported reduction in GHG emissionsd
[39] Grain, stalk juicea,b Fermentation Bagasse Returned to field 1 L of bioethanol produced 52 to 69%
[10] Grain, stalk juice, bagassea−c Fermentation Distillers grains, grain, vinasse Feedstock for CHP, cellulosic ethanol 1 MJ of bioethanol 35 to 72%
[9] Stalk juiceb Fermentation Bagasse Heat source, electricity, animal feed, cellulosic ethanol 1 L of bioethanol produced
[37] Sorghum stemb Continuous solid-state fermentation Grain, vinasse - 1000 L of bioethanol produced
[17] Sorghum stemb Advanced solid-state fermentation Grain, bagasse Steam generation, forage 1 MJ of bioethanol 36.7 to 48%
Aguilar-Sánchez et al. 2018 Sorghum stemb Fermentation Bagasse Waste, CHP Tons sorghum biomass harvested and harnessed
from 1 ha of land in 1 year
− 20 to 200%
[27] Sorghum stemb Advanced solid-state fermentation Distillers grains, grain Steam generation, fertilizer 1 MJ of bioethanol 20 to 66%
  1. aGrain sorghum
  2. bSweet sorghum
  3. cForage sorghum
  4. dCompared to gasoline on functional unit given and may represent range of results from various scenarios used in each study