Research Article
Co-Digestion of Sugar Beet Silage Increases Biogas Yield from Fibrous Substrates
Table 1
Characteristics of feedstock and inoculum.
| | Parameter | Inoculum | S | M | G |
| | pH | 7.7 | 3.5 | 5.0 | 5.1 | | TS (%) | 5.2 | 13.0 | 35.7 | 57.0 | | VS (%) | 3.2 | 11.3 | 28.5 | 42.2 | | VS/TS (%) | 61.3 | 86.8 | 80.0 | 74.0 | | C (%) | 39.7 | 37.7 | 46.3 | 42.1 | | N (%) | 3.6 | 1.1 | 1.4 | 2.8 | | C/N | 11.2 | 34.0 | 33.2 | 15.0 | | VFA as C2H4O2 (g kg−1) | ND | 35.0 | ND | ND | | Lignin (g kg−1) | ND | <9.0 | 22.0 | 32.0 | | Cellulose (g kg−1) | ND | 64.0 | 160.0 | 249.0 | | Hemicellulose (g kg−1) | ND | 76.0 | 158.0 | 112.0 | | Crude protein (g kg−1) | ND | 81.0 | 79.0 | 157.0 | | Crude fat (g kg−1) | ND | 8.0 | 29.0 | 39.0 | | Starch (g kg−1) | ND | 74.0 | 397.0 | 5.0 | | Sugar (g kg−1) | ND | 32.0 | <5.0 | 6.0 |
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ND: not determined; S: sugar beet silage; M: maize silage; G: grass silage.
Fresh mass of sample; total solid mass of sample.
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