munity is now achieving a 25 percent by weight separation of wastes he following items: mixed paper, 44%; cardboard, 6%; plastics, 10% 16%; glass, 12%; and mixed metal (tin cans and other metals), 12% tion of waste components given in column 3 of Table 3-4 is representa tes that are now collected, determine the as generated percentage distr waste components.
munity is now achieving a 25 percent by weight separation of wastes he following items: mixed paper, 44%; cardboard, 6%; plastics, 10% 16%; glass, 12%; and mixed metal (tin cans and other metals), 12% tion of waste components given in column 3 of Table 3-4 is representa tes that are now collected, determine the as generated percentage distr waste components.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:TABLE 3-4
Typical physical composition of residential MSW excluding recycled
materials and food wastes discharged with wastewater (1990)
Percent by weight
Component
Organic
Food wastes
Paper
Cardboard
Plastics
Textiles
Rubber
Leather
Yard wastes
Wood
Misc. organics
Inorganic
Glass
Tin cans
Aluminum
Other metal
Dirt, ash, etc.
Total
United States"
Range
6-18
25-40
3-10
4-10
0-4
0-2
0-2
5-20
1-4
4-12
2-8
0-1
1-4
0-6
Typical'
9.0
34.0
6.0
7.0
2.0
0.5
0.5
18.5
2.0
8.0
6.0
0.5
3.0
3.0
100.0
Packaging materials
79,5
50-60
12-16-
4-8
20-30
6-8
2-4
Davis, Californiad
6.0
33.1
7.9
10.7
2.4
2.5
0.1
17.7
5.0
0.4
5.8
3.9
0.4
3.6
0.5
100.0
= 20.5
a Adapted in part from Refs. 2, 3, 9, and 14-16. Reported percentage distributions are exclusive of special and
hazardous wastes.
bTwenty percent of the households in the United States are assumed to have food waste grinders. Additionally,
it is assumed that the percentage of food waste ground up and discharged with wastewater is 25 percent.
Current (1990) recycling rate for the United States assumed to be 11 percent.
Adapted in part from Ref. 10.
Based on measurements made over a five-year period (1985 to 1990) during the first two weeks of October
(see Table 3-9).
Transcribed Image Text:3-3. A community is now achieving a 25 percent by weight separation of wastes made
up of the following items: mixed paper, 44%; cardboard, 6%; plastics, 10%; yard
waste, 16%; glass, 12%; and mixed metal (tin cans and other metals), 12%. If the
distribution of waste components given in column 3 of Table 3-4 is representative of
the wastes that are now collected, determine the as generated percentage distribution
of the waste components.
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