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Table 1 The mass and energy flows of incoming materials and outgoing products for the seven cases

From: Techno-economic evaluation of integrated first- and second-generation ethanol production from grain and straw

Case 1G E1 B1 C5E1 C5B1 UB1 UC5B1
Unit tons/h MW tons/h MW tons/h MW tons/h MW tons/h MW tons/h MW tons/h MW
Inputs
 Raw material, 1G 55 240 45 198 45 198 45 198 45 198 45 198 45 198
 Raw material, 2G 0 0 23 116 23 116 23 116 23 116 23 116 23 116
 Methane produced and used in plant 0 2 3 37 1 10 2 21 1 14 1 10 1 14
 Natural gas (methane) purchased 4 58 0 1 0 0 1 20 0 0 0 0 0 0
 Electricity produced and used in plant 4 5 6 5 6 8 7
 Fresh water 122 0 141 0 141 0 134 0 135 0 141 0 135 0
 Harvesting and transportation 7 9 9 9 9 9 9
Outputs
 Ethanol 20 147 20 147 20 147 22 167 22 167 20 147 22 167
 Methane (sold) 0 0 0 0 4 53 0 0 3 35 4 53 3 35
 Methane produced total 0 2 3 37 5 63 2 21 4 49 5 63 4 49
 DDGS (dry) 19 85 21 91 9 38 19 83 9 37 9 38 9 37
 Carbon dioxide 20 0 20 0 20 0 23 0 22 0 20 0 22 0
 Electricity, total 14 14 9 14 9 9 9
 Electricity, sold 10 8 3 9 4 0 2