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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