Research Article
Improvement of Biogas Production from Orange Peel Waste by Leaching of Limonene
Table 1
Methane yield of pretreated orange peel waste at different temperature, time, and peel/solvent ratio.
| Temperature (°C) | Time (min) | Peel/solvent ratio | Citrus waste size | Methane yield (Nm3/kg VS) |
| Untreated | Homogenized | 0.131 ± 0.008 | 20 | 10 | 1 : 2 | Homogenized | 0.101 ± 0.011 | 40 | 10 | 1 : 2 | Homogenized | 0.097 ± 0.009 | 20 | 300 | 1 : 2 | Homogenized | 0.040 ± 0.004 | 40 | 300 | 1 : 2 | Homogenized | 0.051 ± 0.010 | 20 | 10 | 1 : 12 | Homogenized | 0.071 ± 0.006 | 40 | 10 | 1 : 12 | Homogenized | 0.074 ± 0.006 | 20 | 300 | 1 : 12 | Homogenized | 0.094 ± 0.016 | 40 | 300 | 1 : 12 | Homogenized | 0.060 ± 0.014 | Untreated | Chopped | 0.061 ± 0.004 | 20 | 10 | 1 : 2 | Chopped | 0.177 ± 0.011 | 40 | 10 | 1 : 2 | Chopped | 0.162 ± 0.015 | 20 | 300 | 1 : 2 | Chopped | 0.134 ± 0.016 | 40 | 300 | 1 : 2 | Chopped | 0.102 ± 0.017 | 20 | 10 | 1 : 12 | Chopped | 0.217 ± 0.009 | 40 | 10 | 1 : 12 | Chopped | 0.076 ± 0.011 | 20 | 300 | 1 : 12 | Chopped | 0.120 ± 0.005 | 40 | 300 | 1 : 12 | Chopped | 0.121 ± 0.016 |
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