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Estimate the time to collect recyclables in green roll-out containers from a 1000-foot-long street if the homes are 50 feet apart, on both sides of the road, and a two-person crew is doing the collecting. Estimate that it takes 30 seconds to empty the contents of each green container into the truck, use a set-out amount of 12 kg.

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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 3, Problem 3.7P
Textbook Problem
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Estimate the time to collect recyclables in green roll-out containers from a 1000-foot-long street if the homes are 50 feet apart, on both sides of the road, and a two-person crew is doing the collecting. Estimate that it takes 30 seconds to empty the contents of each green container into the truck, use a set-out amount of 12 kg.

To determine

Estimated time to collect recyclables

Explanation of Solution

Given information:

Length of street for both sides =2×1000=2000ft

  D=50ft×0.3048m1ft=15.24mB=12kg

Concept used:

  T=DL(1e kD)C

  S=23.2+1.8B

  Total time=Travel time+Sorting time+Waiting time

  TTravel timeDTravel distanceCConversion factorL,kCoefficientsSAverage sorting timeBAverage set-ot amount

Calculation:

From the table 3-2, for two persons crew size L=24.3kmm-1 and k=1.7×102m-1 .

Conversion factor for SI units is 0.278 .

  T=DL( 1 e kD )C=15

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