Research Article
Bioconversion of Sugarcane Vinasse into High-Added Value Products and Energy
Table 5
Summary of results of anaerobic biodegradability assays.
| | Trial | Sample | Final pH | Initial COD (mg/L) | Final COD (mg/L) | COD removal (%) | Biogas volume (mL) | Methane (%) | SMP average (mL /g ) |
| | 1 | Raw | 7.5 ± 0.1 | 3781 | 671 ± 22 | 82.2 ± 0.6 | 28.3 ± 7.0 | na | na | | Medium 2 | 7.1 ± 0.1 | 3848 | 1002 ± 7 | 74.0 ± 0.2 | 20.3 ± 6.0 | na | na | | 2 | Raw | 7.0 ± 0.1 | 3600 ± 35 | 792 ± 52 | 78.0 ± 1.4 | 42.8 ± 13.7 | 48.2 ± 9.7 | 81.20 | | Medium 3 | 6.8 ± 0.1 | 5627 ± 106 | 1711 ± 70 | 69.6 ± 1.2 | 71.3 ± 17.9 | 55.9 ± 3.8 | 113.07 | | Medium 4 | 6.5 ± 0.0 | 7597 ± 64 | 263 ± 31 | 96.5 ± 0.4 | 100.5 ± 19.4 | 48.7 ± 6.00 | 77.61 | | 3 | Raw | 7.5 ± 0.1 | 3230 | 1134 ± 82 | 64.9 ± 2.5 | 44.5 ± 8.7 | 44.7 ± 2.4 | 105.38 | | Medium 6 | 7.1 ± 0.1 | 3950 | 1692 ± 101 | 57.2 ± 2.6 | 43.8 ± 4.3 | 49.5 ± 1.3 | 107.56 | | 4 | Raw | 7.3 ± 0.0 | 4917 | 1295 ± 46 | 73.7 ± 0.9 | 59.0 ± 10.6 | 62.1 ± 12.4 | 112.41 | | Medium 7 | 7.2 ± 0.0 | 4157 | 1530 ± 79 | 63.2 ± 1.9 | 47.0 ± 1.0 | 49.1 ± 3.7 | 97.59 | | Medium 8 | 7.3 ± 0.0 | 4513 | 1663 ± 122 | 63.1 ± 2.7 | 47.3 ± 9.0 | 50.8 ± 7.9 | 93.54 |
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na: not analyzed.
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