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45. A landfill is to be designed to serve a population of 200000 for a period of 25 years. The solid waste (SW) generation is 2 kg/person/day. The density of the uncompacted SW is 100 kg/m³ and a compaction ratio of 4 is suggested. The ratio of compacted fill (i.e, SW+ cover) to compacted SW is 1.5. The landfill volume (in million m³) required is __________.
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- 24 million m³
- 21 million m³
- 21.9 million m³
- 22 million m³
Correct Option: C
21.9 Total waste Population = 2 × 105
Waste generation/day = 2kg × 2 × 105
= 4 × 105kg/ day
For 25 years,
Total waste = 4 × 105 × 25 × 365
= 365 × 107 kg/25 years
| Compaction ratio = | = | = 0.4 | ||
| Vbefore compaction | V |
| V = | = 365 × 105 m³ | |
| 100 |
V' = 0.4 × 365 × 105 = 1.46 × 105 m³
| = | + | = 1.5 | |||
| sw | sw | sw |
| ∴ | = 0.5 | |
| sw |
∴ Cover = 0.5 × sw = 0.5 × 146 × 105
= 73 × 105 m³
∴ Total volume = (146 + 73) × 105
= 219 × 105m³
= 21.9 × 106 m³
= 21.9 million m³
