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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.