|
Total hazardous waste
 |
|
|
| in thousands of tonnes |
| |
|
|
|
| |
|
|
|
| |
|
|
| 2004 |
|
97 |
|
|
|
| 2003 |
|
61 |
|
|
|
| 2002 |
|
831 |
|
 |
|
Recycled |
|
 |
|
Landfilled |
|
 |
|
Incinerated |
| The increase in total 2004 hazardous waste tonnage compared
to 2003 is attributable to the Pechiney acquisition. |
| Total hazardous waste trends vary as specific substances
are subject to regulatory changes and individual country classifications.
For example, Alcan data in 2003 shows a large decrease over 2002 due to
residue disposal pond returned supernatant liquor at the Gove, Australia
refinery being declassified as hazardous waste in 2003. |
| Bauxite residue is excluded in 2003 and 2004 and is
now reported separately. |
Total hazardous waste rate
|
|
|
| in tonnes of hazardous waste per million US$ sales |
| |
|
|
|
| |
|
|
|
| |
|
|
| 2004 |
|
3.89 |
|
|
|
| 2003 |
|
4.40 |
|
|
|
| 2002 |
|
66.57 |
|
|
|
Recycled |
|
|
|
Landfilled |
|
|
|
Incinerated |
Bauxite residue
|
|
|
| in millions of tonnes |
| |
|
|
| 2004 |
|
4.3 |
|
|
|
| 2003 |
|
3.13 |
|
|
|
| 2002 |
|
2.78 |
| The increase in bauxite residue in 2004 is mainly due
to the Pechiney acquisition. |
Bauxite residue rate
|
|
|
| in tonnes of bauxite residue per tonne of alumina hydrate produced |
| |
|
|
| 2004 |
|
0.89 |
|
|
|
| 2003 |
|
1.01 |
|
|
|
| 2002 |
|
0.84 |
| Excludes bauxite residue from joint ventures outside
of Alcan's internal reporting system. |
Generated spent potlining
|
|
|
| in thousands of tonnes |
| |
|
|
| 2004 |
|
78.6 |
| |
|
41.7 |
| |
|
0 |
| |
|
54.5 |
|
|
|
| 2003 |
|
44.5 |
| |
|
77.5 |
| |
|
0 |
| |
|
1.7 |
|
|
|
| 2002 |
|
47.1 |
| |
|
49.1 |
| |
|
0 |
| |
|
17.2 |
|
|
|
1,000s of tonnes of spent potlining generated |
|
 |
|
Landfilled |
|
|
|
Incinerated |
|
|
|
Recycled |
| The increase in spent potlining generated in 2004 is
largely due to the Pechiney acquisition and an unusally large production
of spent potlining (16,000 tonnes) in Vlissingen following a major retrofit.
The 2003 figure has been restated due to the availability of more accurate
figures. The amount of spent potlining per year fluctuates as it depends
on the number of potlinings replaced as part of routine potline maintenance.
|
Generated spent potlining rate
|
|
|
| in kg per tonne of hot metal produced |
| |
|
|
| 2004 |
|
23.2 |
|
|
|
| 2003 |
|
20.5 |
|
|
|
| 2002 |
|
21.5 |
| The increase in the rate of 20.5 in 2003 to 23.2 in
2004 is largely attributable to an unusally large production of spent potlining
(16,000 tonnes) in Vlissingen following a major retrofit. |
|
