GATE CE 2018 Set 1 — Question 35
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Environmental Engineering → Municipal Solid Waste → Sanitary Landfill
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Question
A city generates kg of municipal solid waste (MSW) per year, out of which only 10% is recovered/recycled and the rest goes to landfill. The landfill has a single lift of 3 m height and is compacted to a density of kg/m. If 80% of the landfill is assumed to be MSW, the landfill area (in m, up to one decimal place) required would be ______
Correct answer
27271 to 27274
Solution
1.Calculate the mass of MSW sent to the landfill:
Total MSW generated = kg/yearPercentage recovered/recycled = 10%
Percentage sent to landfill =
Mass of MSW to landfill = kg/year
2.Calculate the volume occupied by the MSW:
Density of MSW in landfill = kg/mVolume of MSW () = m
3.Calculate the total landfill volume:
MSW is assumed to be 80% of the total landfill volume.Total Landfill Volume () = m
4.Calculate the required landfill area:
Height of the lift () = 3 mArea = mRounding to one decimal place, the required area is m. The official range is to .
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