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Table 1 Characteristics of VR and inoculum

From: Enhanced methane production of vinegar residue by response surface methodology (RSM)

Parameter

VR

Inoculum

TS (%)a

96.60 ± 0.19

14.29 ± 0.10

VS (%)a

91.17 ± 0.03

7.56 ± 0.09

VS/TS (%)

94.38 ± 0.15

52.87 ± 0.36

Ash (%)b

5.62 ± 0.15

47.13 ± 0.36

Cellulose (%)b

22.96 ± 1.43

ND

Hemicellulose (%)b

38.90 ± 1.02

ND

Lignin (%)b

9.20 ± 0.82

ND

C (%)b

46.61 ± 0.02

27.31 ± 0.50

H (%)b

6.83 ± 0.03

4.01 ± 0.02

N (%)b

2.50 ± 0.05

2.02 ± 0.17

S (%)b

0.11 ± 0.01

0.60 ± 0.05

O (%)b

37.98 ± 0.09

19.30 ± 0.32

C/N

18.68 ± 0.36

13.57 ± 1.37

  1. ND not detectable
  2. aAs total weight of sample
  3. bAs TS of sample