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#### Municipal Solid Waste

1. 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 __________.
1. 24 million m³
2. 21 million m³
3. 21.9 million m³
4. 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 = Vafter compaction = V' = 0.4 Vbefore compaction V

 V = 365 × 107 = 365 × 105 m³ 100

V' = 0.4 × 365 × 105 = 1.46 × 105
 sw + cover = sw + cover = 1.5 sw sw sw

 ∴ cover = 0.5 sw

∴ Cover = 0.5 × sw = 0.5 × 146 × 105
= 73 × 105
∴ Total volume = (146 + 73) × 105
= 219 × 105
= 21.9 × 106
= 21.9 million m³