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Table 2 Operational condition of the CSTR reactors

From: Culture adaptation for enhanced biogas production from birch wood applying stable carbon isotope analysis to monitor changes in the microbial community

 

R0

R1

 

Day

0

Day

1–5

Day

6–35

Day

36–65

Day

66–95

Day

95–120

Day

0

Day

1–5

Day

6–35

Day 36–65

Day 66–95

Day 95–120

SEBW (g/Day)

0

0

7.7

16.3

16.3

16.3

0

0

7.7

16.3

28.6

37.2

CM (mL/day)

0

72

100

150

150

150

0

2.4

100

150

200

200

OLR (g VS/L∙day)

0

0.4

1

1.8

1.8

1.8

0

0.4

1

1.8

2.7

3.2

C:N ratio

–

15.57

26.34

30.71

30.71

30.71

–

15.57

26.34

30.71

35.33

40.95

pH

7.6

8.2

7.6

7.38

7.47

7.42

7.72

8.24

7.61

7.4

7.33

7.01

NH4 (g/L)

1.88

2.87

1.65

0.67

0.59

0.56

1.7

2.97

1.44

0.77

0.58

0.52

Acetic acid (mg/L)

186

281

524

451

407

166

296

315

267

614

714

841

Propionic acid (mg/L)

110

136

166

214

335

121

158

121

90

301

384

731

Iso-butyric (mg/L)

n. d

58

104

37

173

65

59

69

87

93

311

489

Butyric (mg/L)

n. d

41

85

104

398

236

n. d.

13

21

580

417

n. d.

Iso-valeric (mg/L)

8

14

14

2

4

0

5

6

18

40

52

n. d.

Valeric (mg/L)

n. d.

n. d.

n. d.

n. d.

2

n. d.

n. d.

n. d.

n. d.

84

n. d.

n. d.

Total VFA (mg/L)

304

531

892

808

1318

422

517

524

485

1712

1878

2061

  1. The values have been provided as the average value measured over the feeding period
  2. See “Analysis” for details about the used analytical methods
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Biotechnology for Biofuels and Bioproducts

ISSN: 2731-3654

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