Energy and greenhouse data
Melbourne Water has established an inventory of its greenhouse gas emissions to better understand the impact our operations have on the global climate and to improve the management of this impact. Melbourne Water has selected 2000/01 as a baseline year for performance comparisons. The inventory can include planned changes to assets and operational management and it is used to forecast how these changes will affect our emission performance. Each year, the actual operational data related to energy use and greenhouse emissions is added to the inventory so that annual performance can be calculated and compared with forecast performance. The following tables show Melbourne Water’s performance for 2005/06. The inventory is kept up to date with the Australian Greenhouse Office methodologies.
Total emissions (carbon dioxide equivalent, tonnes)
| CO2e Emissions |
Actual |
Forecast |
| 2000/01 |
2001/02 |
2002/03 |
2003/04 |
2004/05 |
2005/06 |
2006/07 |
2007/08 |
2008/09 |
| Electricity (Purchased from Grid) |
272,750 |
281,192 |
262,395 |
288,425 |
295,579 |
273,441 |
247,317 |
242,413 |
236,908 |
| Natural Gas (for Electricity, Shaft Power & Heat)
| 4,190 |
1,753 |
4,901 |
5,834 |
6,989 |
6,700 |
13,936 |
19,136 |
19,157 |
| Natural Gas (for General)
| 90 |
103 |
142 |
142 |
142 |
126 |
126 |
126 |
126 |
| Diesel (for Electricity, Shaft Power & Heat)
| 3,932 |
3,985 |
3,849 |
3,880 |
5,006 |
5,261 |
2,218 |
60 |
60 |
| Petrol
| 2,261 |
2,120 |
2,267 |
2,356 |
2,434 |
2,501 |
2,295 |
2,295 |
2,295 |
| Diesel Transport
| 175 |
199 |
475 |
953 |
842 |
1,053 |
842 |
842 |
842 |
| LPG
| 76 |
105 |
97 |
107 |
89 |
91 |
89 |
89 |
89 |
| Methane (Total Direct Emissions)
| 274,634 |
190,563 |
188,463 |
203,926 |
77,776 |
46,147 |
57,219 |
59,925 |
62,526 |
| Nitrous Oxide
| 6,504 |
6,523 |
7,535 |
6,517 |
4,012 |
6,322 |
6,219 |
6,533 |
6,847 |
| Sink CO2 from Trees
| -1,007 |
-1,395 |
-1,891 |
-2,384 |
-2,912 |
-3,495 |
-4,175 |
-4,834 |
-5,550 |
| Biogas Methane (Total Captured)
| 0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| Total Liable CO2e Emissions
| 563,606 |
485,149 |
468,234 |
509,757 |
389,956 |
338,147 |
326,087 |
326,586 |
323,301 |
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Energy consumption by type of fuel (terrajoules)
| |
Actual |
Forecast |
| 2000/01 |
2001/02 |
2002/03 |
2003/04 |
2004/05 |
2005/06 |
2006/07 |
2007/08 |
2008/09 |
| Electricity imported from grid
| 669 |
694 |
651 |
719 |
723 |
672 |
608 |
596 |
582 |
| Natural gas imported
| 67 |
29 |
79 |
94 |
112 |
107 |
221 |
303 |
303 |
| Diesel imported
| 51 |
51 |
50 |
50 |
65 |
68 |
29 |
1 |
1 |
| Biogas used
| 324 |
423 |
369 |
374 |
390 |
441 |
564 |
604 |
605 |
| Vehicle fuels
| 32 |
31 |
36 |
43 |
42 |
46 |
40 |
40 |
40 |
| Total energy used
| 1,141 |
1,227 |
1,185 |
1,281 |
1,331 |
1,334 |
1,461 |
1,544 |
1,532 |
| Increase on 2000/01
| |
108% |
97% |
108% |
104% |
100% |
110% |
106% |
99% |
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Energy consumption by operation (terrajoules)
| |
Actual |
Forecast |
| 2000/01 |
2001/02 |
2002/03 |
2003/04 |
2004/05 |
2005/06 |
2006/07 |
2007/08 |
2008/09 |
| Eastern Treatment Plant
| 681 |
709 |
696 |
719 |
751 |
738 |
803 |
859 |
866 |
| Western Treatment Plant
| 85 |
142 |
141 |
143 |
198 |
235 |
238 |
253 |
253 |
| Winneke water treatment plant
| 153 |
170 |
139 |
204 |
163 |
138 |
142 |
142 |
120 |
| Water – other
| 37 |
33 |
34 |
33 |
32 |
39 |
40 |
40 |
40 |
| Sewage transfer
| 134 |
128 |
121 |
120 |
122 |
116 |
123 |
124 |
126 |
| Minor sites
| 7 |
3 |
4 |
5 |
8 |
8 |
8 |
8 |
8 |
| Vehicles
| 32 |
31 |
36 |
43 |
42 |
46 |
40 |
40 |
40 |
| Recycle
| 0 |
0 |
0 |
0 |
0 |
0 |
52 |
63 |
63 |
| Other
| 13 |
12 |
14 |
13 |
14 |
15 |
15 |
15 |
15 |
| Total
| 1,141 |
1,227 |
1,185 |
1,281 |
1,331 |
1,334 |
1,461 |
1,544 |
1,532 |
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Renewable electricity generation (terrajoules)
| |
Actual |
Forecast |
| 2000/01 |
2001/02 |
2002/03 |
2003/04 |
2004/05 |
2005/06 |
2006/07 |
2007/08 |
2008/09 |
| Eastern Treatment Plant
| 311.5 |
364.7 |
303.9 |
305.1 |
312.1 |
297.6 |
365.7 |
404.8 |
405 |
| Western Treatment Plant
| 12.2 |
58 |
65.3 |
69.3 |
77.8 |
143.6 |
197.8 |
199.6 |
200.4 |
| Existing hydro-electricity plants
| 102.9 |
90.4 |
114.5 |
95.4 |
104.9 |
104.1 |
95.8 |
96.3 |
109 |
| Proposed hydro-electricity plants
| 0 |
0 |
0 |
0 |
0 |
0 |
21.1 |
94.9 |
124.7 |
| Total Renewable energy generation
| 426.6 |
513.1 |
483.7 |
469.8 |
494.9 |
545.3 |
680.4 |
795.6 |
839.1 |
| Total Melbourne Water energy use
| 1141.4 |
1227.4 |
1184.9 |
1280.8 |
1331.4 |
1333.8 |
1461.2 |
1544 |
1531.8 |
| Renewable energy key performance indicator
| 37% |
42% |
41% |
37% |
37% |
41% |
47% |
52% |
55% |
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Emissions per million litres of water supplied (kilograms)
| |
Actual |
Forecast |
| 2000/01 |
2001/02 |
2002/03 |
2003/04 |
2004/05 |
2005/06 |
2006/07 |
2007/08 |
2008/09 |
| Carbon dioxide emissions in kilograms per million litres of water supplied
| 1,116 |
1,042 |
968 |
1,162 |
884 |
761 |
<700/td>
| 670 |
635 |
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