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Assume the following fraction, by weight, of material in a refuse: a. Estimate the in-place density of this refuse, using the bulk density values listed in Table 8-1. b. If the following materials are recovered in a materials recovery operation, estimate the bulk density of the remaining refuse going to the landfill: c. If the life of the landfill for this community was originally calculated as 10 years, what is the expected life if the materials listed in pan (b) are recovered?

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Solid Waste Engineering

3rd Edition
Worrell + 1 other
Publisher: Cengage Learning,
ISBN: 9781305635203

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Chapter
Section
BuyFindarrow_forward

Solid Waste Engineering

3rd Edition
Worrell + 1 other
Publisher: Cengage Learning,
ISBN: 9781305635203
Chapter 8, Problem 8.3P
Textbook Problem
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Assume the following fraction, by weight, of material in a refuse:

Chapter 8, Problem 8.3P, Assume the following fraction, by weight, of material in a refuse: a. Estimate the in-place density , example  1

a. Estimate the in-place density of this refuse, using the bulk density values listed in Table 8-1.
b. If the following materials are recovered in a materials recovery operation, estimate the bulk density of the remaining refuse going to the landfill:

Chapter 8, Problem 8.3P, Assume the following fraction, by weight, of material in a refuse: a. Estimate the in-place density , example  2

c. If the life of the landfill for
this community was originally calculated as 10 years, what is the expected life if the materials listed in pan (b) are recovered?

To determine

(a)

The total density of the refuse.

Explanation of Solution

Given data:

The following table shows the mass of materials.

    Component Percent by weight
    Food waste 10
    Yard waste 20
    Mixed paper 40
    Corrugated cardboard 100
    Glass 10
    Ferrous(cans) 10

Table (1)

Concept used:

Write the expression to calculate the total density.

  ρtotal=MA+MB+MC+MD+ME+MFMAρA+MBρB+MCρC+MDρD+MEρE+MFρF   ..... (I)

Here, mass of material is M and the density of material is ρ .

The following table shows bulk density of given materials.

    Component Bulk Densities(lb/ft3)
    Food waste 23.04
    Yard waste 4.45
    Mixed paper 3.81
    Corrugated cardboard 1.87
    Glass 18.45
    Ferrous (cans) 6.36

Table (2)

Calculation:

Calculate the total density.

Substitute 10lb for MA , 23.04lb/ft3 for ρA , 20lb for MB , 4.45lb/ft3 for ρB , 40lb for MC , 3

To determine

(b)

The bulk density of the refuse.

To determine

(c)

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