Biorefineries using crops for production of ethanol, biogas and chemicals - Biomass as Energy Source: Resources, Systems and Applications - page 154

Figure 9.3. Fuel ethanol production energy flow diagram. System general material flow analysis (2).
Figure 9.4. General material flow diagram of fuel ethanol (the whole year 2007).
9.5.1 The diagram of system general material flow
The general material flow of the fuel ethanol in the whole year 2007 is as shown in Figure 9.4.
This figure clearly shows the material flow and relative flow rate from raw material to products
and by-product materials (the water added during the process is not shown in the figure).