Page 24 - mobile Workbook-chapter 2

E3. Estimate the energy content from MSW, using the Khan’s equation

Components % by wt

Paper products 25
Corrugated cardboard 15

Plastics 6
Glass 8

Metals 12
Food waste 15

Ash, dirt, misc. 19
Total 100

E4. For the following waste mixture,

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Components % by Wt Uncompacted Bulk Density (kg/m )

Paper products 39 16.00
Ferrous 10 3.50

Food wastes 26 1.90
Yard wastes 25 2.60

What is the bulk density for the waste mixture prior to compaction?

3
Assume that the compacted density in the landfill cell is 575 kg/m . Estimate the volume
reduction (expressed as %) during compaction in the landfill.

E5. The higher heating value for cellulose, C6H10O5 is 32,500 kJ/kg. Determine the lower

heating value.
E6. Given data for the following waste sizes, calculate the arithmetic mean, the geometric mean

and the weighted mean of particle size distribution.

Sieve size (mm)
Particle diameter (mm) 100 75 50 25

Weight of fraction (kg) 9 12 28 8

Number of particles 450 1200 2500 5250

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