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Table 4 Breakdown of the total capital investment cost in million Swedish Kronor

From: Effects of steam pretreatment and co-production with ethanol on the energy efficiency and process economics of combined biogas, heat and electricity production from industrial hemp

 

AD 

AD-R

SP-AD

SP-AD-R

Et-AD

Et-AD+

Feedstock handling

9

9

9

9

9

9

Pretreatment

-

-

115

115

115

115

YC & SSF

-

-

-

-

123

123

Distillation

-

-

-

-

30

30

Anaerobic digestion

228

283

174

215

356

141

Separation

37

42

30

30

59

79

Biogas upgrading

54

60

59

61

48

48

Combined heat and power production1

154

157

124

125

104

97

Storage

3

3

9

9

25

25

Heat exchanger network

3

3

8

9

34

37

Total direct costs

487

558

529

574

905

705

Total indirect costs

660

702

521

551

855

745

Fixed capital2

1148

1259

1050

1125

1760

1450

Working capital

12

12

13

13

32

32

Total capital investment3

1160

1272

1063

1138

1792

1482

  1. A summary of the scenarios is given in Figure 3. 1 EUR ≈ 8.9 SEK.
  2. YC: yeast cultivation, SSF: simultaneous saccharification and fermentation.
  3. 1 Includes the flue gas condenser.
  4. 2 Sum of direct and indirect costs.
  5. 3 Sum of fixed capital and working capital.