Table 2. Elemental Analysis and ICP Results of Food Waste, Biochar, and AC.
| elemental
composition (wt %) |
|||||||||
|---|---|---|---|---|---|---|---|---|---|
| by elemental
analysis |
by
ICP-OES |
||||||||
| sample | N | C | H | S | others (by difference) | Ca | Na | P | O content calculated based on minerals |
| food waste (washed and dried) | 5.7 | 48.8 | 7.4 | 0.8 | 37.3 | 0.8 | 0.0 | 0.6 | 1.1 |
| Biochar-525C-2H | 6.5 | 71.9 | 1.6 | 0.1 | 19.9 | 3.9 | 0.1 | 1.9 | 4.0 |
| FWAC-750C-3H | 5.2 | 68.8 | 0.9 | 0.2 | 24.9 | 5.2 | 0.2 | 2.7 | 5.6 |
| FWAC-850C-3H | 2.5 | 62.6 | 0.5 | 0.3 | 34.1 | 6.5 | 0.2 | 3.3 | 6.9 |
| FWAC-950C-3H | 1.6 | 40.9 | 1.6 | 0.2 | 55.7 | 13.6 | 0.3 | 7.8 | 15.6 |
| FWAC-950C-1H | 1.9 | 48.0 | 1.0 | 0.2 | 48.9 | 8.8 | 0.2 | 5.6 | 10.8 |
| FWAC-950C-5H | 1.2 | 33.2 | 0.6 | 0.2 | 64.8 | 14.5 | 0.4 | 9.0 | 17.6 |