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Sustainability Report 2016
86
Emissions
Effluent and Waste
Unit
2016
2015
2014
2013
2012
Carbon dioxide
(CO
2
)
Daily average in
metric tonnes
(Metric tonnes per
million MJ of town
gas)
907 (11.55) 898 (11.82) 904 (11.70) 931 (12.09) 904 (11.92)
Nitrogen oxides
(NO
X
)
Daily average in kg
(Kg per million MJ
of town gas)
314 (4.00)
292 (3.84)
310 (4.02)
353 (4.59)
318 (4.20)
Sulphur oxides
(SO
X
)
Daily average in kg
(Kg per million MJ
of town gas)
1.4 (0.02)
1.3 (0.02)
1.4 (0.02)
1.2 (0.02)
1.5 (0.02)
Greenhouse
gases(Production
equipment)
9
Tonnes CO
2
-e
359,300 357,845 358,582 365,981 360,634
CO
2
reduction
equivalent
to electricity
saved (Towngas
Headquarters
and Ma Tau Kok
office)
7
Tonnes
3,873
3,803
3,613
3,376
2,981
Unit
2016
2015
2014
2013
2012
Treated
wastewater
discharged to
marine water
bodies
Daily average in
cubic metres
79
47
N/A
N/A
N/A
Wastewater
discharged to
sewage
Daily average in
cubic metres
241
239
N/A
N/A
N/A
Total wastewater
discharged
Daily average in
cubic metres (Cubic
metres per million
MJ of town gas)
321 (4.10)
287 (3.77)
307 (3.97)
323 (4.20) 435 (5.74)
Non - hazardous
waste landfilled
10
Tonnes
150.4
123.6
129.5
126.7
N/A
Non - hazardous
waste recycled
11
Tonnes
125.7
210.0
N/A
N/A
N/A