1. Dynamic eco-efficiency modeling for recycling of C&D waste.
Rolf André Bohne, Håvard Bergsdal and Helge Brattebø
Industrial Ecology Programme
Norwegian University of Science and Technology
NTNU Trondheim

2. Purpose of study Evaluate C&D waste strategies
Present results in a meaningful way to decision makers
Dynamic projections of future waste generation
Which data are available, and where is the information scarce?
What affects future waste generation?
What waste treatment options should be prioritized?
How do different parts of waste treatment systems perform?
Evaluate according to both economic and environmental aspects
Are the same treatment options preferrable regardless of localization?

3. Method Estimate the amount of waste generating activities (m2/year)
Determine specific waste generation factors (kg/m2)
Calculate overall waste generation projections (kg/year)
Use waste projections as input to scenarios on waste treatment
Evaluation by using Eco-efficiency to assess the relationship between economic and environmental aspects
Plotting economic and environmental performance of waste treatment alternatives to visualize the results and compare the treatment options

4. Findings
Long term models needed due to increasing amounts of waste and ageing of buildings
Need for improved knowledge of building stock, lifetime, composition, economy
Yet valuable results
Significant variations within a country, different solutions should be applied according to localization
Eco-efficiency models suitable in guiding local policy makers and actors