Example 7-2 Selection of container size for use at a commercial facility A commercial facility produced the following quantities of solid waste each week for a calendar quarter of operation. Using these waste production data, determine the size of container at which it becomes more cost effective to make extra pickup trips, on call instead of using a larger-sized container. Assume the data given below are applicable.

Example 7-2 Selection of container size for use at a commercial facility A commercial facility produced the following quantities of solid waste each week for a calendar quarter of operation. Using these waste production data, determine the size of container at which it becomes more cost effective to make extra pickup trips, on call instead of using a larger-sized container. Assume the data given below are applicable.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Collection Systems

The collection systems form a part of sanitary engineering, which is a sub-branch of civil engineering. It is also known as public health engineering and wastewater engineering. It is a methodology followed to remove and properly dispose of human waste, along with creating systems to provide safe and clean usable water. These measures ensure a hygienic and disease-free community. Sanitary engineering, apart from building sewer disposal units, is also involved in plumbing, fire protection, hydraulics, life safety, environmental protection, information technology, microbiology, pathology, and so on.

Question

Example 7-2 Selection of container size for use at a commercial facility
A commercial facility produced the following quantities of solid waste
each week for a calendar quarter of operation. Using these waste production
data, determine the size of container at which it becomes more cost effective to
make extra pickup trips, on call instead of using a larger-sized container.
Assume the data given below are applicable.
1. Waste production data
Week no.
1
2
3
4
5
6
7
2. Collection system data
Capacity yd3
30
35
40
45
50
-
-
Waste yd3/wk
41
30
35
34
39
25
32
-
Week no.
8
9
10
11
12
13
Capital cost $ Annual O&M cost &/yr
3000
150
175
225
Waste yd3/wk
27
37
36
33
28
31
3500
4000
4900
6100
Cost per trip= 50$.00/trip
Useful life of the containers= 10 yr
Discount rate=10%
Capital recovery factor= (i=10%, n=10yr) = 0.16275
300
400

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Step 1: Finding total cost of container in the first year.

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Step 2: Finding trip cost in Table (1 part)

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