Chemical composition of raw sludge
| Compound | LD: % | CF: % | CR: % |
|---|---|---|---|
| Silicon dioxide (SiO2) | 1.11 | 0.98 | 0.13 |
| Aluminium oxide (Al2O3) | 0.35 | 0.51 | 0.05 |
| Iron (III) oxide (Fe2O3) | 89.6 | 76.1 | 95.7 |
| Calcium oxide (CaO) | 4.61 | 5.07 | 0.02 |
| Magnesium oxide (MgO) | 0.85 | 1.17 | <0.01 |
| Sodium oxide (Na2O) | 0.13 | 0.26 | <0.01 |
| Potassium oxide (K2O) | 0.07 | 0.13 | <0.01 |
| Manganese oxide (MnO) | 0.37 | 0.66 | 0.95 |
| Phosphorus pentoxide (P2O5) | 0.48 | 0.42 | 0.3 |
| Zinc oxide (ZnO) | 1.84 | 13.5 | 0.01 |
| Sulfur trioxide (SO3) | 0.01 | 0.02 | <0.01 |
| Loss on ignition (LOI) | <0.01 | 0.01 | 2.74 |
| Compound | LD: % | CF: % | CR: % |
|---|---|---|---|
| Silicon dioxide (SiO2) | 1.11 | 0.98 | 0.13 |
| Aluminium oxide (Al2O3) | 0.35 | 0.51 | 0.05 |
| Iron (III) oxide (Fe2O3) | 89.6 | 76.1 | 95.7 |
| Calcium oxide (CaO) | 4.61 | 5.07 | 0.02 |
| Magnesium oxide (MgO) | 0.85 | 1.17 | <0.01 |
| Sodium oxide (Na2O) | 0.13 | 0.26 | <0.01 |
| Potassium oxide (K2O) | 0.07 | 0.13 | <0.01 |
| Manganese oxide (MnO) | 0.37 | 0.66 | 0.95 |
| Phosphorus pentoxide (P2O5) | 0.48 | 0.42 | 0.3 |
| Zinc oxide (ZnO) | 1.84 | 13.5 | 0.01 |
| Sulfur trioxide (SO3) | 0.01 | 0.02 | <0.01 |
| Loss on ignition (LOI) | <0.01 | 0.01 | 2.74 |
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