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Impact of Waste Recycling on the Composition of MSW. Problem Statement.

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Impact of Waste Recycling on the Composition of MSW


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    1. Impact of Waste Recycling on the Composition of MSW

    2. Problem Statement Assess the impact of waste recycling on the percentage distribution of the components found in collected residential MSW shown in Table 1 using recycled waste composition data presented in Table 2. If 11% of the waste generated is recycled what is the composition of the generated waste? It is recommended that you use an electronic spread sheet for this problem.

    3. Table 1. Composition of Collected Waste

    4. Table 2. Composition of Recycled Waste

    5. Step 1: Calculate the lb of recycled waste • Assume a basis of 100 lb of generated waste • Recall that: Collected + Recycled = Generated • 11 lb out of 100 lb generated are recycled • Table 2 provides composition of recycled waste • Example: lb of paper recycled: 11 x 0.5 = 5.5 lb recycled/100 lb generated

    6. Table 3. Recycled MSW

    7. Table 3. Recycled MSW

    8. Step 2. Calculate lb Collected • If 11 lb/100 lb Generated are recycled, 89 lb are collected • Calculate weight distribution in collected waste, totaling 89 lb • Example: paper 89 x 0.28 =

    9. Table 4. Collected MSW

    10. Table 4. Collected MSW

    11. Step 3. Calculate Composition of Generated Waste • Add together lb collected /100lb of generated and lb recycled/100 lb generated (last column of Tables 3 and 4)

    12. Table 5. Composition of Generated Waste

    13. Class Problem • If 22% of the waste generated is recycled what is the composition of the generated waste in this example?

    14. Return to Home Page Last updated July 2004 by Dr. Reinhart