Table 1 Characteristics of substrates and inoculum
Parameter | SPV | DM | PM | CM | OS | CS |
|---|---|---|---|---|---|---|
TS (%)a | 91.8 ± 0.7 | 20.2 ± 0.1 | 31.6 ± 0.2 | 28.2 ± 0.3 | 3.8 ± 0.0 | 20.7 ± 0.6 |
VS (%)a | 78.7 ± 0.9 | 17.0 ± 0.4 | 24.2 ± 0.3 | 17.3 ± 0.3 | 2.0 ± 0.1 | 11.6 ± 0.5 |
VS/TS (%) | 85.7 ± 0.4 | 83.9 ± 1.6 | 76.5 ± 0.8 | 61.4 ± 0.7 | 52.6 ± 1.3 | 56.1 ± 0.5 |
C (%)b | 41.4 ± 1.0 | 43.5 ± 0.2 | 40.0 ± 0.1 | 31.4 ± 0.8 | 30.1 ± 0.9 | 30.1 ± 0.9 |
H (%)b | 5.0 ± 0.2 | 6.0 ± 0.4 | 5.5 ± 0.5 | 4.3 ± 0.3 | 4.3 ± 0.2 | 4.3 ± 0.2 |
N (%)b | 2.7 ± 0.0 | 2.7 ± 0.2 | 3.6 ± 0.1 | 4.1 ± 0.1 | 4.0 ± 0.1 | 4.0 ± 0.1 |
C/N | 15.1 ± 0.6 | 16.1 ± 1.2 | 11.2 ± 0.4 | 7.7 ± 0.1 | 7.5 ± 0.0 | 7.5 ± 0.0 |
pH | ND | 8.2 ± 0.1 | 6.5 ± 0.0 | 7.2 ± 0.0 | 8.1 ± 0.0 | 8.8 ± 0.0 |
TA (mg CaCO3/g)b | ND | 33.4 ± 0.2 | 65.5 ± 3.4 | 53.0 ± 1.6 | 5.7 ± 0.0 | 24.7 ± 0.4 |
VFAs (g/kg)b | 0.1 ± 0.0 | 0.1 ± 0.0 | 2.0 ± 0.2 | 0.5 ± 0.1 | 0.2 ± 0.0 | 0.2 ± 0.0 |
TAN (mg/g)b | ND | 2.4 ± 0.0 | 12.1 ± 0.5 | 5.5 ± 0.1 | ND | ND |