| Kind of MSW | MSW | |
| Contaminants of fuel (wet base) | Ash (wet base) | Large |
| Cl (dry base) | A little | |
| S (dry base) | Large | |
| Ash constituents | Alkaline metals (K,Na) | Large |
| Alkaline earth metal (Ca, Mg) | Large but fluctuated | |
| Heavy metal (Zn, Pb) | Large | |
| Others (Fe, P) | Large but fluctuated | |
| Corrosion of formed environment | Severe | |