Table 2.
LCI of disposal scenarios for 1 tonne waste.
| Item | Unit | Scenarios |
|||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | I | II | |||
| Raw materials | Electricity consumption | kWh | 43.4 | 134.27 | 374.40 | 159.02 | 64.29 | 198.00 | 79.45 |
| Generated energy | kWh | – | – | – | – | 449.89 | – | 444.96 | |
| Net energy generation | kWh | – | – | – | – | 385.60 | – | 365.51 | |
| Fresh water | kg | 2242.42 | 905 | 330 | 2242.42 | 2061.69 | 1295.83 | 2168.50 | |
| Transportation | t*km | 10.62 | 10.78 | 10.04 | 10.89 | 10.17 | 11.44 | 10.25 | |
| Sodium hydroxide | kg | 1.98 | – | – | 29.90 | 5.00E−02 | 39.77 | 4.00E−03 | |
| Activated carbon | kg | 2.37 | – | 0.13 | 1.20E−03 | 0.54 | 5.50 | 0.65 | |
| Hydrochloride | kg | – | – | – | – | 0.04 | – | 0.44 | |
| Sodium hypochlorite | kg | – | 16.7 | – | – | – | 2.50E−03 | 2.74E−03 | |
| Sulfate | kg | – | – | – | – | – | 1.25 | 4.00E−03 | |
| Urea | kg | – | – | – | 8.73 | – | 3 | – | |
| Ammonia | kg | – | – | – | – | 3.68 | – | 2.59 | |
| Hydrated lime | kg | – | – | – | – | 11.80 | 88.52 | 16.84 | |
| Lime | kg | 5.93 | – | – | 2.8 | – | – | – | |
| Natural gas | m3 | – | – | – | – | – | 22.50 | – | |
| Potland cement | kg | – | – | – | – | – | – | 3.12 | |
| Disinfection solution | kg | 0.99 | – | 4.25 | – | – | – | – | |
| Chlorine dioxide | kg | – | – | 0.02 | – | – | – | ||
| Kerosene | kg | 50 | – | – | – | – | – | – | |
| Diesel | kg | – | 61 | – | 48 | 0.55 | 0.83 | 0.82 | |
| Direct air emissions | Sulfur dioxide | kg | 0.05 | 0.51 | – | 1.80 | 0.11 | 1.23 | 0.26 |
| Nitrogen oxides | kg | 0.68 | 0.10 | – | 1.89 | 0.36 | 1.85 | 0.97 | |
| Particulate | kg | 0.16 | 9.26E−04 | – | 0.27 | 4.88E−05 | 0.36 | 0.19 | |
| Hydrogen fluoride | kg | 3.96E−03 | – | – | 0.02 | – | 0.02 | 0.19 | |
| Hydrogen chloride | kg | 3.96E−03 | – | – | 0.13 | – | 0.25 | – | |
| Hydrogen sulfide | kg | – | 4.63E−05 | 2.70E−05 | – | 2.69E−06 | 1.08E−03 | – | |
| Carbon monoxide | kg | – | – | – | 0.72 | – | 0.86 | – | |
| Volatile organic compound | kg | – | 0.02 | – | – | – | 0.11 | – | |
| Ammonia | kg | – | 4.07E−04 | 4.87E−03 | 0.08 | 2.02E−05 | 0.06 | – | |
| Mercury | kg | 2.37E−05 | – | – | 4.67E−04 | – | 5.00E−04 | – | |
| Cadmium | kg | 1.98E−05 | – | – | – | – | 6.25E−05 | – | |
| Lead | kg | 4.00E−03 | – | – | 4.47E−03 | – | 3.75E−04 | – | |
| Arsenic | kg | – | – | – | 4.67E−04 | – | 1.25E−05 | – | |
| Nickel | kg | 9.22E−04 | – | – | – | – | 5.00E−05 | – | |
| Dioxins | ug | 7.53 | – | – | 0.87 | – | 0.55 | 0.66 | |
| Waste water | Waste water | t | 0.17 | 0.33 | 0.384 | 1.79 | 0.13 | 0.2975 | 0.27 |
| Chemical oxygen demand | mg | 38461.54 | – | – | 89,300 | – | 29,750 | 15917.81 | |
| Suspended solids | mg | – | – | – | – | – | 17833.33 | 5315.07 | |
| Ammonia nitrogen | mg | 4395.6 | – | – | 8.93E + 03 | – | 2958.33 | 2136.99 | |
| Phosphorus | mg | – | – | – | – | – | 291.67 | – | |
| Lead | mg | – | – | – | – | – | 150 | – | |
| Mercury | mg | – | – | – | – | – | 58.33 | – | |
| Chromium | mg | – | – | – | – | – | 58.33 | – | |
| Arsenic | mg | – | – | – | – | – | 120.83 | – | |
| Solid waste | Sanitary landfill | t | 0.30 | – | – | 0.29 | 0.25 | 0.27 | 0.27 |