Table 1 The proximate analysis of pigeonpea stalk and maize stalks
Sample | Moisture content (wt %, wb) | Fixed carbon (wt %. Db) | Volatile matter (wt %. Db) | Ash (wt %. Db) | Biochar yield (%) |
|---|---|---|---|---|---|
Pigeonpea | 7.54 ± 0.14 | 14.35 ± 1.04 | 76.64 ± 5.58 | 2.00 ± 0.15 | – |
Maize | 8.11 ± 0.01 | 13.21 ± 0.84 | 73.56 ± 4.68 | 1.79 ± 0.12 | – |
PPB 400 | 6.32 ± 0.12 | 84.60 ± 7.58 | 5.50 ± 0.49 | 3.12 ± 0.28 | 34.00 ± 2.47 |
PPB 500 | 6.18 ± 0.62 | 85.21 ± 5.95 | 4.70 ± 0.33 | 4.35 ± 0.30 | 33.00 ± 2.10 |
PPB 600 | 6.10 ± 0.07 | 86.00 ± 2.51 | 3.90 ± 0.12 | 4.99 ± 0.14 | 29.00 ± 2.60 |
MB 400 | 7.35 ± 0.16 | 64.85 ± 4.58 | 6.00 ± 0.42 | 18.56 ± 1.31 | 29.00 ± 2.03 |
MB 500 | 7.21 ± 0.22 | 65.00 ± 4.06 | 5.30 ± 0.33 | 23.44 ± 1.46 | 28.00 ± 0.82 |
MB 600 | 7.14 ± 0.70 | 67.56 ± 2.49 | 2.90 ± 0.11 | 28.12 ± 1.03 | 26.00 ± 1.84 |