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Table 3 Breakdown of the total capital investment cost in million Swedish Kronor (SEK)

From: Techno-economic evaluation of stillage treatment with anaerobic digestion in a softwood-to-ethanol process

  Reference A1 A2 A3 A4 B
Raw material handling 10 10 10 10 10 10
Pretreatment 115 115 115 115 115 115
Yeast cultivation and SSF 119 119 119 119 119 119
Distillation 47 47 47 47 47 47
Separation1 26 26 26 26 26 25
Evaporation 47 - - - - -
Drying and pellet production 42 45 47 - - -
CHP2 155 110 136 266 343 248
Storage 33 28 28 28 28 29
Heat exchanger network 18 11 11 11 11 12
AD 15 75 75 74 74 111
Total direct cost 628 586 613 696 773 716
Total indirect cost 578 551 557 539 556 557
Fixed capital investment 1206 1137 1170 1236 1329 1273
Working capital 69 62 75 32 32 32
Total capital investment 1275 1199 1246 1268 1360 1305
  1. 1 Refers to stillage separation in the reference case and in scenarios A1-A4 and to separation of the effluent of AD in scenario B.
  2. 2 Includes the flue gas condenser for scenarios with district heating (A2-A4 and B).
  3. A summary of the scenarios is given in Table 1.
  4. AD: anaerobic digestion; CHP: combined heat and power production; SSF: simultaneous saccharification and fermentation.