Table 2.
Proximate and elemental analysis for Caribbean pine sawdust (CPS), biochar produced at 500 °C 1/h (BC500) and co-inoculation process with PSB (BC500/PSB).
| Parameters | Caribean Pine Sawdust (CPS) | Biochar (BC500) | Biochar co-inoculated with PSB (BC500/PSB) |
|---|---|---|---|
| Basic Properties | |||
| Moisture (%) | 7.0 ± 0.31 | 3.6 ± 0.51 | 99 ± 2 |
| Apparent Density (g cm-3) | 0.22 ± 0.09 | 0.43 ± 0.51 | 0.42 ± 0.1 |
| Porosity (%) | 57.5 ± 5.8 | 67 ± 1 | 64.3 ± 1.1 |
| Size particle (mm) | 5.0 ± 1 | 3.0 ± 0.7 | 3.0 ± 1 |
| pH | 3.7 ± 0.8 | 7.1 ± 0.6 | 6.4 ± 0.5 |
| Electrical Coductivity dS cm-1 | 0.53 ± 0.02 | ND | ND |
| Proximate analysis (wt.%, wet basis) | |||
| TOC (%) | 57.89 ± 0.15 | 50.9 ± 2.2 | 54 ± 3 |
| CF (%) | 14.15 ± 0.21 | 26 ± 2 | 23 ± 2 |
| CV (%) | 80.68 ± 0.31 | 71.6 ± 2.4 | 75 ± 3 |
| Ash (%) | 5.17 ± 0.37 | 2.4 ± 0.9 | 2.0 ± 0.9 |
| Yield biochar (%) | NA | 19 ± 0.7 | NA |
| Elemental analysis (wt.%, dry basis) | |||
| C (%) | 48.16 | 71.04 | 25.12 |
| O (%) | 45.87 | 26.9 | 73.61 |
| H (%) | 5.89 | 1.74 | 1.23 |
| N (%) | 0.08 | 0.32 | 0.04 |
| Atomic ratio | |||
| H/C ratio | 0.12 | 0.02 | 0.05 |
| O/C ratio | 0.95 | 0.381 | 2.93 |
| (O + N)/C | 0.954 | 0.383 | 2.931 |
| Bacteria co-inoculated in BC500 | |||
| Total PSB count UFC g-1 | NSD | NSD | 4.0 × 105 ± 1.0 × 102 |
| Pseudomona sp. | NSD | NSD | 3.0 × 105 ± 1.0 × 101 |
| Kosakonia sp. | NSD | NSD | 1.3 × 105 ± 1.0 × 101 |
| Serratia sp. | NSD | NSD | 2.6 × 105 ± 1.0 × 102 |
* NSD: Not determined.