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SECTION
3 NATURAL RESOURCES CAPITAL STOCK
| 3.5 |
Solid
Waste |
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| 3.5.2.5 |
The
figures presented in Table 3.5a show a steadily
increasing trend in the total waste arisings
(MSW and C&D) during the previous 15
year period. When these figures are normalised
for population, the amount of waste requiring
disposal per capita increased by 50% between
1986 and 1995 but has declined slightly
since then (excepting 1998 when a slight
increase was again recorded). It is interesting
to note that the peak in 1995 coincides
with the peak in C&D waste arisings
for the same period. As C&D waste arisings
are generally at least 2-3 times greater
than municipal waste arisings, it is clear
that trends in the production of C&D
waste dictate the overall trends in arisings.
Annex C provides
a detailed breakdown of MSW and C&D
waste arisings for 1986-1998.
| Table
3.5a Waste Arisings (Tonnes Per Day) |
Table
3.5a Waste Arisings (Tonnes Per Day)
| Year |
Mid
Year Population |
Total
Waste Arisings(1) |
Quantity
of Waste
(tpd) Requiring Final
Disposal Per Capita |
Total
Quantity of
Waste Landfilled(2) |
| 1986 |
5,524,600
|
24,500 |
0.0044 |
8,960 |
| 1987 |
5,580,500 |
23,590 |
0.0042 |
10,770 |
| 1988 |
5,627,600 |
26,250 |
0.0047 |
13,190 |
| 1989 |
5,686,200 |
24,990 |
0.0044 |
12,480 |
| 1990 |
5,704,500 |
24,460 |
0.0043 |
15,920 |
| 1991 |
5,752,000 |
28,650 |
0.0050 |
24,110 |
| 1992 |
5,800,500 |
33,060 |
0.0057 |
20,210 |
| 1993 |
5,901,000 |
30,850 |
0.0052 |
20,220 |
| 1994 |
6,035,400 |
32,280 |
0.0053 |
24,300 |
| 1995 |
6,156,100
|
40,190 |
0.0065 |
22,260 |
| 1996 |
6,311,000
|
38,660 |
0.0061 |
16,150 |
| 1997 |
6,502,100 |
37,110 |
0.0057 |
15,780 |
| 1998 |
6,687,200 |
41,440 |
0.0062 |
16,550 |
Notes:
(1)
Waste Arisings = MSW + C&D Material (including
public fill)
(2) Quantity Landfilled = MSW + C&D Waste
+ Special Waste Source: Consultants calculations
based on data from EPD Annual Monitoring
of Solid Waste Reports
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| 3.5.2.6 |
Other
types of waste arisings also contribute to
the total demand for disposal capacity although
they do not utilise significant amounts of
landfill capacity. One category of waste that
is often, at present, placed in landfills
in relatively small amounts compared to MSW
and C&D waste is special waste which consists
of inter alia sludges; livestock waste; asbestos
waste; animal carcasses and abattoir waste;
clinical waste; and condemned goods, of which
sludges form the greatest volume. In 1998,
sewage sludge, sewage screenings, and waterworks
sludge comprised 402 tpd, or 2.4% of all waste
going to landfill. |
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| 3.5.2.7 |
Other
categories of waste arisings include chemical
wastes and dredged materials (classified with
fuel and furnace ash as "other waste"),
both of which are not normally landfilled.
Chemical waste contributed 76,650 tonnes to
annual waste arisings in 1998 (EPD 1999b)
which was an increase for the third consecutive
year, although levels are less than they were
during the late 1980s and early 1990s when
chemical waste quantities peaked at nearly
118,000 tonnes in 1992. This reduction is
principally due to the relocation of many
industries producing chemical waste to the
Mainland, although the resultant shortfall
in feedstock for the Chemical Waste Treatment
Centre has been topped up with MARPOL waste
from ships, such that the CWTC is currently
operating at around 75% of its design capacity. |
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| 3.5.2.8 |
Arisings
of dredged contaminated and uncontaminated
mud are estimated at 4.9 Mm3, and 6.9 Mm3,
respectively for 1999 and are directly dependent
on the number and size of reclamation and
harbour improvement projects underway in a
given period. |
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