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Waste Indicators
The aim of this pilot project was to investigate the extent to which life-cycle-based
indicators could be calculated and applied to help prioritise efforts in the field of
waste management, and follow the development of waste management in an environmental and
resource perspective.
A preliminary analysis of the environmental effects of managing individual waste
fractions showed that a number of environmental impacts should be included in the
assessment. However, completing relevant life-cycle-based calculations that take all
environmental impacts into account is not possible, because the data required is not
available. It is particularly difficult to obtain accurate data on the content of toxic
and persistent substances in waste.
Three life-cycle-based indicators are proposed for all waste fractions that reflect resource
consumption, primary energy consumption, and landfill requirement. These
indicators supplement each other, but do not necessarily provide a complete picture of the
environmental effects of waste management. Resource consumption reflects the overall unit
for materials that are consumed during waste management. Primary energy consumption is
chosen as an indicator for various environmental impacts such as global warming and
acidification, which are primarily linked to energy consumption. The landfill requirement
indicator specifies the total landfill space needed for disposing of waste from the entire
life-cycle of a given waste fraction.
An important point of discussion throughout the project has been which indicators it is
possible to calculate compared to the environmental impacts that these indicators reflect.
These discussions have led to the results being presented in two different ways each with
their distinct strengths and weaknesses. For both models, incomplete and uncertain data
means that the indicators should be regarded as a helpful tool in the decision making
process, which involves a variety of factors. The continuous publication of indicator
values to a wider audience will require careful presentation of the main assumptions and
uncertainties.
Model A provides a kind of overview of the resource consumption and environmental
effects of the majority of waste fractions. However, this would be a rather comprehensive
and time-consuming task. In addition, the results would primarily be useful in a
discussion of the extent to which there is a need to reduce waste generated during the
production and consumption phases of a product's life-cycle, which is beyond the scope of
this project.
Model B, on the other hand, adequately fulfils the most important aim of calculating
life-cycle-based indicators, namely to identify the most significant potential resource
and environmental savings associated with further optimising waste management operations.
At the same time, Model B would be able to document that efforts to minimise the
environmental impacts of waste management have so far proven to be effective.
Model B can be carried out initially with eight man-months and can be updated annually
with an effort of around two man-months (incl. provision and updating of LCA data).
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