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88
Sustainability Report 2011
NO
x
Daily
average in kg
356
344
324
342
345
(Kg per
million MJ of
town gas)
(4.65)
(4.59)
(4.39)
(4.55)
(4.68)
SO
x
Daily
average in kg
1.5
1.9
2.5
3.6
3.1
(Kg per
million MJ of
town gas)
(0.02)
(0.03)
(0.03)
(0.048)
(0.04)
Greenhouse
gases
6
(production
equipment)
Metric
tonnes in
terms of CO
2
equivalent
362,307 355,958 357,043 370,647 360,388
Aqueous Emissions (Hong Kong)
Wastewater
Daily
average in
cubic metres
447
351
404
493
515
(Cubic
metres per
million MJ of
town gas)
(5.84)
(4.68)
(5.47)
(6.55)
(6.98)
Waste Avoidance/Recycling (Hong Kong)
Chemical waste
generated
Daily
average in kg
51
178
64
185
27
(Kg per
million MJ of
town gas)
(0.67)
(2.37)
(0.87)
(2.45)
(0.37)
Spent catalyst
collected for metal
recovery
Metric
tonnes
41.1
36
12
114
23
Metal chemical
drums reused
Number
216
161
211
201
219
Plastic chemical
drums reused
Number
1,064
818
882
878
660
Spent lube oil
recycled
Metric
tonnes
16.1
15.17
3.41
5.85
3.91
Key Statistics
Unit
2011
2010
2009
2008
2007