Research Article
Effect of Ultrasonic Pretreatment on Biomethane Potential of Two-Phase Olive Mill Solid Waste: Kinetic Approach and Process Performance
Table 3
Characteristics of the two-phase OMSW used (80% w/w) after different ultrasound pretreatment times and without pretreatment.
| Time | Moisture | TS | VS | CODt | CODs | Solubilization | (min) | (%) | (g/kg) | (g/kg) |
(g O2/kg) | (g O2/kg) | (%) |
| Untreated OMSW | 78.8 ± 0.2 | 212.0 ± 2.6 | 182.7 ± 2.3 | 265.4 ± 0.7 | 114.7 ± 3.2 | 43 | 20 | 79.9 ± 0.2 | 206.4 ± 0.2 | 177.7 ± 1.9 | 331.3 ± 1.0 | 148.3 ± 0.2 | 56 | 40 | 80.8 ± 0.1 | 191.8 ± 0.9 | 164.1 ± 0.2 | 331.4 ± 0.0 | 130.9 ± 0.0 | 49 | 60 | 78.6 ± 0.4 | 213.8 ± 3.6 | 181.4 ± 5 | 376.6 ± 0.4 | 146.8 ± 0.0 | 55 | 90 | 78.3 ± 0.3 | 217.3 ± 2.9 | 183.8 ± 0.0 | 370.0 ± 0.1 | 151.0 ± 0.0 | 57 | 120 | 79.3 ± 0.3 | 206.8 ± 3.2 | 173.3 ± 0.0 | 385.2 ± 0.6 | 150.6 ± 0.1 | 57 | 180 | 77.9 ± 0.5 | 221.4 ± 5 | 188.6 ± 7.4 | 377.5 ± 0.0 | 126.1 ± 0.0 | 48 |
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TS: total solids; VS: volatile solids; CODt: total chemical oxygen demand; CODs: soluble chemical oxygen demand.
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