This is a Solid Waste Management Paper based on Application of Bond Theory. The paper also entails Journal of the Environmental Engineering Division, ASCE, 104, n. EE1.
Solid Waste Management Paper- Application of Bond Theory
FIRSTLY:
Looking at the table below, will Charleston, SC or Vancouver, BC have a coarser particle size distribution? Explain how you came to this determination.
Table 4-3 Rosin-Rammler Exponents for Shredded Refuse n X0 Washington, DC 0.689 2.77 Wilmington, DE 0.629 4.56 Charleston, SC 0.823 4.03 San Antonio, TX 0.768 1.04 St. Louis, MO 0.995 1.61 Houston, TX 0.639 2.48 Vancouver, BC 0.881 2.20 Pompano Beach, FL 0.587 0.67 Milford, CT 0.923 1.88 Source: Based on Stratton, F.E., and H. Alter. 1978. “Application of Bond Theory to Solid Waste Shredding.” Journal of the Environmental Engineering Division, ASCE, 104, n. EE1.
SOLUTION:
The values represented as “n” are constants and describes the material uniformity. X0 is the characteristic particle waste size at which 63.2% of the particles (by weight) are smaller. In addition A larger X0 defines a coarser particle size of the output. Therefore, Charleston, SC with a 4.03 characteristic particle size will have the coarser product coming out of the shredder.
SECONDLY:
(a) As a consultant, your client gives you literature that they have received from two manufacturers of shredder equipment. The bulk density specification of Unit “A” is 35.7 lb./ft3 and the bulk density of Unit “B” is 450 kg/m3. However which unit will deliver a higher bulk density refuse? Show your work. (b) Referring to the diagram below, how far above the floor is the bulk density of the stored MSW compressed to 250 kg/m3?
Solid Waste Management Paper- Application of Bond Theory
SOLUTION:
(a) As a consultant, your client gives you literature that they have received from two manufacturers of shredder equipment. The bulk density specification of Unit “A” is 35.7 lb./ft3 and the bulk density of Unit “B” is 450 kg/m3. Which unit will deliver a higher bulk density refuse? Show your work.
Step 1: We will convert the 35.7 lb./ft3 to the same units as Unit B—kg/m3. This requires knowing the conversion factors for lbs. to kg, as well as ft3 to m3. Using a conversion table, we find the following information: 1 lb. = 0.454 kg and 1 ft3 = 0.0283 m3 Step 2: Set up the calculation by beginning with the units you have 35.7 ??. ??3 × 1??3 0.0283 ?3 × 0.454 ?? 1 ??. = ???.? ?? ?? Unit A’s bulk density
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