United Nations Environment Programme - Stockholm Convention on ...

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Methodology
• Extrapolation of results was based on national
statistical data such as population, per capita
energy consumption, per capita waste generation,
land use etc.
• Identified potential sources in Tanzania were:
Medical Waste Incineration, Iron and steel production
and foundries, Fossil Fuel Power Plant, Biomass Power
Plants, Household heating and cooking, Cement
Production, Lime Production, Brick Production, Glass
Production, Transport and uncontrolled combustion
• Key
Results
• A = Waste Incineration
• B = Ferrous and non-ferrous metal production
• C = Power generation and heating
• D = Production of Mineral Products
• E = Transport
• F = Uncontrolled combustion processes
• G = Production of chemicals and consumer goods
• H = Miscellaneous
• I = Disposal/land land filling
• J = Hotspots
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A
B
C
D
E
Annual
release
(g TEQ/a)
Air
112.84
0.23
12.89E3
0.807
0.599
Results
Annual
release
(g TEQ/a)
Water
0
0
0
0
0
Annual
release
(g TEQ/a)
Land
0
0
0
0
0
Annual
release
(g TEQ/a)
Product
0
0
0
0
0
Annual
release
(g TEQ/a)
Residu
al
0.017
0.044
0.3038
0.0310
0
Results Continued
• Information Gaps
ü There is a serious lack of information on unintended
releases. As such information is still needed in the
following areas: unintended waste burning, accidental
fires, production and use of chemicals, miscellaneous,
disposal/landfill and hot spots.
ü In other areas of potential releases there was reluctance to
release data (e.g. from crematorium).
ü Also the absence of concrete emission factors in the tool
kit for specific releases (specific in Tanzania/developing
country) context
ü And the diffusive nature of the information required.
ü contributed to the information gap.
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F
G
H
I
J
Total
Results Continued
Annual
release
(g TEQ/a)
Air
2.50E3
ND*
0
0.00037
0
15.51E3
Annual
release
(g TEQ/a)
Water
0
0
0
0
ND
0
Annual
release
(g TEQ/a)
Land
38.8
0
0
0
ND
38.8
Annual
release
(g TEQ/a)
Product
0
0
0
0
ND
Annual
release
(g TEQ/a)
Residual
0
0
0
0
ND
0 0.39582
Results Continued
• Existing Management Practices
ü There are air pollution control systems in for
example cement factories (electrostatic
precipitators), foundry factories (scrubbers) etc.
While these may be reducing the amount of
PCDD/PCDF released into the environment their
efficiency was not established.
ü However, it should be mentioned that these were
not installed for the purpose of controlling
PCDD/PCDF.
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