Table 3.
Compost sample characteristics.
| Composting time (days) | DM (% of fresh weight) | pH | C/N-ratio | Odour concentration (ouE/m3) | Total acid in material (mmol/kg compost) | TVOC concentration (ppm) | Microbial analysis | Group | |
|---|---|---|---|---|---|---|---|---|---|
| Cool-1%:3 | 3 | 44.1 | 4.6 | 29.2 | 450,000 | 201 | 549 | Yes | A |
| Cool-1%:8 | 8 | 51.5 | 8.4 | 23.8 | 1,300,000 | b.d.a | 741 | Yes | – |
| Cool-1%:16 | 16 | 44.9 | 8.7 | 25.5 | 22,000 | b.d.a | 44 | Yes | B |
| Cool-16%:3 | 3 | 48.6 | 6.7 | 24.3 | 14,000 | b.d.a | 162 | Yes | B |
| Cool-16%:8 | 8 | 46.0 | 8.3 | 20.6 | 7100 | b.d.a | 16 | Yes | B |
| Cool-16%:16 | 16 | 48.9 | 8.3 | 22.8 | 14,000 | b.d.a | 2 | Yes | B |
| Cool-16%(70):3 | 3 | 47.2 | 7.0 | 21.8 | 5500 | b.d.a | 154 | Yes | B |
| Cool-16%(70):8 | 8 | 50.6 | 8.4 | 20.7 | 12,000 | b.d.a | 12 | Yes | B |
| Cool-16%(70):16 | 16 | 49.1 | 8.2 | 23.4 | 12,000 | b.d.a | 6 | Yes | B |
| Heat-16%:3 | 3 | 42.3 | 4.8 | 27.0 | 74,000 | 139 | 495 | No DNA | A |
| Heat-16%:8 | 8 | 45.0 | 4.95 | 27.9 | 280,000 | 120 | 554 | No DNA | A |
| Heat-16%:16 | 16 | 44.9 | 5.0 | 26.8 | 220,000 | 147 | 358 | No DNA | A |
| Heat-16%(70°):3 | 3 | 42.3 | 4.8 | 25.5 | 930,000 | 136 | 751 | Yes | A |
| Heat-16%(70°):8 | 8 | 43.5 | 4.9 | 28.5 | 740,000 | 129 | 1018 | No DNA | A |
| Heat-16%(70°):16 | 16 | 46.8 | 5.0 | 26.3 | 2,000,000 | 156 | 684 | No DNA | A |
| IVAR 1 | 30 | 61.0 | 8.4 | 14.7 | 15,200 | b.d.a | 7 | Yes | B |
| IVAR 2 | 30 | 57.1 | 8.0 | 14.7 | 23,600 | b.d.a | 19 | Yes | B |
| IVAR 3 | 30 | 62.4 | 8.0 | 12.7 | 41,000 | b.d.a | 10 | Yes | B |
| NSR 1a | 33 | 46.7 | 5.0 | 17.2 | 730,000 | 259 | – | Yes | A |
| NSR 1b | 90 | 54.6 | 6.0 | 18.8 | 250,000 | 218 | – | No | A |
| NSR 2a | 33 | 46.4 | 5.1 | 18.4 | 1,500,000 | 257 | – | Yes | A |
| NSR 2b | 90 | 52.5 | 5.4 | 17.5 | 490,000 | 329 | – | No | A |
a
Below the detection limit of 9, 6, 8 and 6 mmol/kg compost for acetic, lactic, propionic and butyric acid respectively.