Table 4. Results of the color test for six compost samples taken from the static and rotating bioreactors.
| Compost color test at day-8 | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Sample No. | Static bioreactor | Rotating bioreactor | ||||||||
| L* | a* | b* | ΔE | Remarks | L* | a* | b* | ΔE | Remarks | |
| 1 | 22.6 | 4.6 | 7.7 | 8.5 | Blackness, greenness and yellowness slightly increased. Texture and compost structure did not improve. | 17.6 | 2.7 | 4 | 15.1 | Blackness, greenness and yellowness increased. Texture and compost structure improved. |
| 2 | 22.8 | 4.4 | 7.8 | 8.4 | 17.5 | 2.7 | 4 | 15.2 | ||
| 3 | 22.7 | 4.5 | 7.5 | 8.4 | 17.5 | 2.7 | 4 | 15.2 | ||
| Mean | 22.7 | 4.5 | 7.7 | 8.4 | 17.5 | 2.7 | 4 | 15.2 | ||
| SD | 0.1 | 0.1 | 0.15 | 0.06 | 0.06 | 0.0 | 0.0 | 0.06 | ||