Table 2.
Mean ± SE values of selected greenhouse gas emission in kilogram per tonne of charcoal produced from Acacia decurrens species using different charcoal-making kilns at Fagta lokoma district, North Western, Ethiopia (n = 12).
| Kiln type | CO2 | CO | NO | NOx | SO2 | CH4 |
|---|---|---|---|---|---|---|
| Traditional | 2439.43 ± 26.35a | 474.57 ± 19.4a | 2.38 ± 0.04a | 2.77 ± 0.10a | 0.70 ± 0.03a | 51.00 ± 0.21a |
| Casamance | 1300.47 ± 15.54b | 262.93 ± 9.04b | 0.91 ± 0.05b | 1.20 ± 0.06b | 0.41 ± 0.03b | 32.77 ± 0.67b |
| GMDR | 1252.47 ± 8.22b | 220.17 ± 4.97bc | 0.36 ± 0.04c | 0.67 ± 0.11c | 0.37 ± 0.03bc | 27.40 ± 0.31c |
| MRV steel |
1027.13 ± 3.02c |
180.43 ± 2.29c |
0.33 ± 0.02c |
0.38 ± 0.05c |
0.26 ± 0.01c |
21.83 ± 0.07d |
| P-value | *** | *** | *** | *** | *** | *** |
| CV | 1.8 | 7.2 | 6.7 | 11.2 | 10.05 | 2.02 |
Different letters following vertical mean values indicate significant differences at P < 0.05. GMDR: Green mad retort kiln; MRV: Mark v steel kiln; ns: not significant CV: Coefficient of variation; CO2: carbon dioxide; CO: carbon monoxide; NO: nitrogen monoxide; NOx: nitrogen dioxide; SO2: sulphur dioxide; and CH4: methane; ***: P ≤ 0.001.