Solid Waste Engineering: A Global Perspective, Si Edition
3rd Edition
ISBN: 9781305638600
Author: William A. Worrell, P. Aarne Vesilind, Christian Ludwig
Publisher: Cengage Learning
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Chapter 6, Problem 6.3P
To determine
The empirical formula for the organic fraction of refuse and the theoretical production of methane from this hypothetical compound.
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Problem 14:An underground hard rock mine operation employs a 8 -m3 skip with an 14-tonne capacity to hoist ore to the surface. The blasted ore passes through the crusher to obtain small fragment size before loading of the skip takes place. The crushed ore is moist and has the following properties:Dry bulk density = 2300 kg/m3 Water content = 16%The mine is considering running the operation without the crusher. This means that the blasted ore of considerably larger size will be loaded directly into the skip. The blasted ore is moist and has the following properties:Dry bulk density = 1750 kg/m3Void ratio = 0.75Degree of saturation = 22%(a) Determine the wet bulk density of the crushed ore.(b) Determine the wet bulk density of the blasted ore.(c) Determine if the hoisting productivity of the skip will be affected by this change.(d) Estimate the bank weight of the rock using a % swell of 40%.
Agitate the sieves by hand or by mechanical apparatus for a sufficient period. The criterion for sieving time is that, after completion, not more than 1% of the residue on any individual sieve will pass that sieve during 1 minute of continuous hand sieving.
Chapter 6 Solutions
Solid Waste Engineering: A Global Perspective, Si Edition
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