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. 2017 Feb 23;10:51. doi: 10.1186/s13068-017-0733-0

Fig. 5.

Fig. 5

GHG emissions (expressed as GWP) for assessed ethanol production systems using the RED method. Sensitivity analyses for off-site enzyme production, using alternative data and assumptions, are included. For illustration purposes, “Chemicals” include SO2, NH3, H3PO4, antifoam, (NH4)2HPO4 and MgSO4. “Nutrients” include soybean oil meal, (NH4)2SO4, KH2PO4 and FeSO4*7H2O