Waste reduction final report -4 - Test Input

180
160
140
120
100
80
60
40
20
0
1996 2000 2003
TOTAL C&D
RESIDENTIAL
NON RESIDENTIAL
Figure 3 Total C&D generated in USA in last decade, MMT
Franklin Associate data shown above assumes a value for C&D waste generated per unit area
of buildings and uses that value to calculate the total C&D waste generation based on the
annual volume of construction. The report uses 21.5 Kg/m 2 of waste generation for
residential and 19.5 Kg/m 2 for non-residential construction in their calculations. These
numbers coincide with other reports that a 187 m 2 house produces 3,630 Kg of debris.
Demolition wastes were estimated based on 550 Kg/m 2 for residential and 850 Kg/m 2 for nonresidential
buildings. These numbers will be used later in this report to establish benchmarks
for better, good and standard practices for waste generation on a site depending on
Residential or Non- Residential building.
A different approach is to calculate the total C&D waste based on population. Table 4 shows
the waste collected from various landfills throughout U.S. The collected data has been
divided into three categories: a) C&D disposed (excluding recycled materials, b) C&D
generated (including recycled materials), and c) C&D generated as a percentage of total
MSW (30%). Based on the population of a region and the waste generated, one can find the
waste per capita per day using the following formula:
Waste in Kilogram per capita per day = Waste in MMT x 1000
Population x 365
As illustrated in Table 4, the C&D waste generation rate per capita per day ranges from 0.64
to 1.46 kilograms. Considering a recycling rate of 25% the average generation rate for the
first category may be estimated to be: 0.90 / 0.75 = 1.20 kg per capita.
Overall average per capita per day may be calculated as follows:
(1.20 + 1.02 + 0.99) / 3 = 1.07 Kg per capita per day
Using the average per capita rate of 1.07 kilograms and U.S. population the total waste
generated in each particular year can be calculated:
1. Total waste generated in 1996
Population of U.S. in 1996 – 266,490,000
Total C&D Waste generated in 1996 = 104.08 MMT
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