The typical composition of the municipal solid waste generated in the United Sta
ID: 1716668 • Letter: T
Question
The typical composition of the municipal solid waste generated in the United States by weight is shown in the table below with typical moisture values.
Calculate
(a) the composition of the waste, percent by weight, with the moisture remove and
(b) the moisture content of the waste.
Component Percent by Weight Typical Moisture Content (%)
Paper and paperboard 37.5 6
Yard waste 17.9 60
Food 6.7 70
Glass 6.7 2
Ferrous metal 6.3 3
Nonferrous metal 2.0 2
Plastics 8.3 2
Wood 6.3 20
Rubber and leather 2.4 2
Textiles 2.9 10
Miscellaneous 3.0 8
Explanation / Answer
a) To find percent by weight with moisture removed = (Weight of waste)/(Weight of Waste+Moisture content)
weight of waste = ( (0.375-(0.375*0.06)) + (0.179-(0.179*0.6)) + (0.067-(0.067*0.7)) + (0.067-(0.067*0.02)) + (0.063-(0.063*0.03)) + (0.02-(0.02*0.02)) + (0.083-(0.083*0.02)) + (0.063-(0.063*0.2)) + (0.024-(0.024*0.02))) + (0.029-(0.029*0.1) + (0.03-(0.03*0.08))) = 0.3525+0.0716+0.0201+0.06566+0.06111+0.0196+0.08134+0.0504+0.02352+0.0261+0.0276 = 0.79953 ;
Composition of Waste = 0.79953;
Percentage of Weight = 79.953%
The moisture content of Waste = 1-0.79953 = 0.20047;
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