Predicting future waste amounts from demolition activities in the City of Vienna

Transcription

1 Predicting future waste amounts from demolition activities in the City of Vienna Fritz Kleemann, Jakob Lederer, Johann Fellner Research Center of Waste and Resource Management CD Laboratory for Anthropogenic Resources ISWA World Congress , Antwerp (BE)

2 Background - Buildings greatly contribute to the material turnover in urban systems - About 22% of waste flows nationwide (Austria) are related to construction and demolition (excavation material excluded) - High potential to save landfill space and primary resources through recycling - Knowledge about material flows in this system is limited Predicting future waste amounts from demolition activities in the City of Vienna 2/12

3 Case studies I - Investigation of the material composition of buildings prior demolition - Comparison with official reports on waste disposed - Generation specific material values for different building categories - Kleemann et al. (2014) Building Research and Information Predicting future waste amounts from demolition activities in the City of Vienna 3/12

4 Case studies II [t] Different reasons for discrepancies Estimation of waste flows not possible based on this data! Predicting future waste amounts from demolition activities in the City of Vienna 4/12

5 Resource cadastre - Resource cadastre - Gives information about the total material stock in buildings - Combined with data about the demolition activity, current and future waste streams can be estimated Predicting future waste amounts from demolition activities in the City of Vienna 5/12

6 Combination of data Information about the material composition of different building types Information about the building structure (GIS - geographical information system) Case studies - analysis of documents - on-site investigation New buildings - final bills - LCA Data - construction plans Area & height of buildings Utilization & construction period of buildings Demolished buildings - analysis of construction plans Literature Period of construction Utilization Mineral materials Organic materials Metals Total residential commercial industrial residential commercial industrial residential commercial industrial residential commercial industrial residential commercial industrial Predicting future waste amounts from demolition activities in the City of Vienna 6/12

7 Material stock [t] 210 [t] pp Predicting future waste amounts from demolition activities in the City of Vienna 7/12

8 Material stock per person Bricks & Mortar 93 [t] Concrete 85 [t] Wood 4 [t] Steel 3.7 [t] 3,9m 3,3m 2m 0,8m Predicting future waste amounts from demolition activities in the City of Vienna 8/12

9 Demolition activity - Data from the building authority - Address of building - notification present - Data from own observations - To cross check if all buildings are represented - Data from remote sensing - Image matching - Compare height models of building stock based on yearly orthophotos - Data from surveying - Wrecking companies - Recyclers - Landfill operators Predicting future waste amounts from demolition activities in the City of Vienna 9/12

10 Relevance & Outlook - Possibility to generate reference values for single buildings being demolished - Information about appearing waste flows on a municipal level (Vienna) - Prediction of waste flows from demolition activities - Resource potential of waste flows (quantitative & qualitative) - Further analysis of the demolition activity (remote sensing methods, statistics) - Further enhancement of database behind the resource cadastre - Involvement of wrecking and recycling companies Predicting future waste amounts from demolition activities in the City of Vienna 10/12

11 Thank you! Contact: Fritz Kleemann PhD-Candidate Phone: fritz.kleemann@tuwien.ac.at