|
CEE 370 |
Fall 2010 |
1.
Waste
container sizing based on population: Problems 13-2 in the D&M
text. .
2.
More
MSW volume calculations: Problem 13-4 in the D&M text.
3.
Landfill
areas & volumes: Problem 13-6 in the D&M text
4.
Energy
from Waste: Problem 13-8 in the D&M text (see example 13-4)
5.
Waste Classification: Using the data in the
attached tables, calculate: (A) the specific weight of a typical composite US
residential MSW; (B) the specific weight of the Davis, CA residential MSW (You
can assume that the specific weight of misc. organics is 220 pounds per cubic
yard), and (C) the moisture content of a typical composite US residential MSW.
Assigned: 5 December 10
Due: not collected
Composition
of residential MSW excluding recycled materials and food wastes discharged with
wastewater (values are in percent by weight)
|
Component |
Typical |
|
|
Organic |
|
|
|
Food wastes |
9 |
6 |
|
Paper |
34 |
33.1 |
|
Cardboard |
6 |
7.9 |
|
Plastics |
7 |
10.7 |
|
Textiles |
2 |
2.4 |
|
Rubber |
0.5 |
2.5 |
|
Leather |
0.5 |
0.1 |
|
Yard Wastes |
18.5 |
17.7 |
|
Wood |
2 |
5 |
|
Misc. Organics |
|
0.4 |
|
Inorganic |
|
|
|
Glass |
8 |
5.8 |
|
Tin cans |
6 |
3.9 |
|
Aluminum |
0.5 |
0.4 |
|
Other metal |
3 |
3.6 |
|
Dirt, ash, etc. |
3 |
0.5 |
|
TOTAL |
100.0 |
100.0 |
Typical
Properties of Residential, uncompacted MSW
|
Type of Waste |
Specific Weight (lb/yd3) |
Moisture Content (% by wt.) |
|
Food
wastes (mixed) |
490 |
70 |
|
Paper |
150 |
6 |
|
Cardboard |
85 |
5 |
|
Plastics |
110 |
2 |
|
Textiles |
110 |
10 |
|
Rubber |
220 |
2 |
|
Leather |
270 |
10 |
|
Yard
wastes |
170 |
60 |
|
Wood |
400 |
20 |
|
Glass |
330 |
2 |
|
Tin
cans |
150 |
3 |
|
Aluminum |
270 |
2 |
|
Other
metals |
540 |
3 |
|
Dirt,
ashes, etc. |
810 |
8 |
|
Ashes |
1255 |
6 |
|
Rubbish |
220 |
15 |