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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.

Solid Waste Engineering
Solid Waste Engineering
3rd Edition
ISBN:9781305635203
Author:Worrell, William A.
Publisher:Worrell, William A.
Chapter8: Landfills
Section: Chapter Questions
Problem 8.3P
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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: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).
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.
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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