Convenzione ENEA - MATTM

Transcription

1 Convenzione ENEA - MATTM Optimization of resources and waste management in construction and quarrying chain: toward a resource efficiency plan A. Luciano, P. Reale, L. Cutaia 5 th International Conference on Sustainable Solid Waste Management Antonella Luciano, ENEA

2 Background and purpose Improving resource efficiency, environmental performance and business opportunities are some of the key objectives of the EU Construction 2020 strategy 1. The aim of this study is to highlight the opportunities offered by the circular economy in the construction sector in terms of waste valorisation and reuse, in light of implementing a strategic resource efficiency plan within a sustainable construction waste management strategy Resource efficiency in the context of construction sector is envised as a broad concept aiming to reduce resources use and waste production during their lifecycle: from material extraction, through manufacture of building materials and products, resource use during occupancy and maintenance, to material recovery at demolition.. 1. European Commission, : Strategy for the sustainable competitiveness of the construction sector and its enterprises COM (2012)

3 Methodology: Material Flow Analysis Evaluation of Waste production, management Recycling rate RM substitution rate potentialities Resources Flow Analysis wastes construction & quarrying chain Waste Recovered and reused Other mining and Import quarriyng sector (B08) Export Stock Waste Domestic demand Recovered and reused Manufacture of other nonmetallic mineral products Import (C23) Export Waste Stock Domestic demand in construction Recovered and reused Construction and demolition (F) System boundaries Raw materials substitution with wastes produced in other sectors: Current reuse rate and residual potentialities other sectors Waste Secondary raw materials Waste Secondary raw materials Waste production Waste to energy plants Metallurgy Other Secondary raw materials and alternative fuel ITALY 3

4 Methodology: specific investigation With residues/wastes produced within the chain Reuse of sludge from stone processing Material recovery in cement production Material recovery in concrete production Energy recovery in cement industry Recycling CDW With residues/wastes produced in other industrial activities Reuse of MSWI bottom ashes For each residue: production recovery and reuse options recycling rate and raw material substitution rate Residual opportunities, not yet utilized, for raw material substitution Regulation and guideline Critical issues Reuse of steel slag Recovery of end of life tyre (ELT)

5 Results: Resource Flow Analysis 10 3 t Other mining and quarriyng sector (B08) Export Import Stock Export 2011 Export 2012 Export 2013 Export 2014 Import 2011 Import 2012 Import 2013 Import 2014 Domestic demand = sold - export + import Product type NACE ProdCom Product type (10 3 t) Product sold (10 3 t) Code Code B Marbles and travertine Limestone stones, alabaster granite sandstone other construction stones gypsum stone limestone (non-inert) clay dolomite slate B siliceous sand construction sands crushed stones for concrete, road and other constructions granules and marble powders granules and marble powders (except marble) Mixed waste clays B bitumen and natural asphalt Tot ornamental stones (B08 11) Tot aggregates (B08 12) Tot bitumen nat. asphalt (B09 99) Total sold Import Export Domestic demand (10 3 t) (10 3 t) (10 3 t) (10 3 t) (10 3 t) (10 3 t) Ornamental stones Aggregates (silt,sand,gravel,fract. stones, slags) Aggregates (Granules and pownders) Bitumen and asphalt Total stock

6 Results: Resource Flow Analysis Manufacture of other nonmetallic mineral products Import (C23) Stock Domestic demand in construction Export Product type (10 3 t) sold (10 3 t) Domestic Demand (10 3 t) Stock (10 3 t) (Manufacture/production of) refractory material bricks and tiles ceramic sanitary ware insulators other ceramic prod. for technical use other ceramic prod cement lime lime products concrete ready for use mortar other prod. concrete, lime, asbestos other stones and minerals marble, other non-metallic minerals Total

7 Results: waste production, management and reuse wastes 197 x 10 3 t 10% for Recovered sludge fron and reused stone x 10 processing 3 t x 10 3 t 70% recovered?? 10% reused?? Other mining and quarriyng sector (B08) Manufacture of other nonmetallic mineral products (C23) Waste production (10 3 t) Nace Code B (3.4 HW) 139.1(2.6 HW) 197.8(4.2 HW) C (108.6 HW) (66.5 HW) (43.3 HW) F (C&D waste) Construction and demolition (F) Optimization efforts must be addressed to improve recovery rates and reuse of those types of waste whose production is considerable and the recovery rate is still low: CDW sludge from stone processing

8 Results: potentialities of raw materials substitution With residues and wastes produced within the chain wastes x 10 3 t 70% recovered?? 10% reused?? Recycling CDW (million tons) Recycling rate Recycled (million tons) Domestic demand for raw material (million tons) 50 10% % Raw materials substitution rate

9 Results: potentialities of raw materials substitution With residues and wastes produced in other industrial activities Energy recovery in cement industry Material recovery in cement production Item Amount ( t) Fossil fuels Waste derived fuels Substitution rate % Methane m Coal Dense burning oil Urban waste Plastic, rubber, end of life tyres sludge from wastewater treatment plants Used oils and/or oily emulsions Other liquid fuels Animal flours 961 Hazardous waste - total % average in EU-27 60% Germany Item Amount (t) Total (t) Mineral rocks Clay Marble Limestone Chalk 510 Pozzolan 510 Shale 255 Other Siderurgic waste Chemical waste Recovery materials from non-hazardous waste Quarrying waste Refractory waste Coal, biomass and waste combustion ashes Desulphurisation chalks others 683 Industrial by-products (not classified as waste) Raw materials substitution rate 6.5%

10 Results: potentialities of raw materials substitution With residues and wastes produced in other industrial activities Reuse of steel slag slag production (10 3 t) recovered cement environ. restoration internal reuse concrete asphalt road ballast GBS ABS BOS EAF C EAF S SMS from EAF SMS integrated works Tot. integrated works Tot. EAF road base Reuse of MSWI bottom ashes Type of recovered materials Disposal Recovery Geographic area (10 3 t) (10 3 t) inert Ferrous metals Non-ferrous metals Nord Centre South Total in Italy ,1

11 Conclusions The construction sector determines the extraction of large amount of raw materials and it is responsible for a consistent production of wastes throughout the life cycle High domestic demand both for raw materials and for manufactured building products The potential in term of substitution of raw materials with residues and wastes produced within the chain is not adequately exploited and further efforts, in term of national policies and strategies are needed to effectively move towards the full application of the circular economy in the sector. The results of this study could be useful to address national policies and strategies in those sectors where further efforts are needed. ENEA supports the Italian Ministry of Environment for the definition of the national resource efficiency plan and the circular economy strategy. 11

12 Antonella Luciano