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Cimpan Et Al. 2015 Alternative Pathways to Collection and Treatment University of Southern Denmark Material flow analysis, carbon footprint and economic assessment of alternative collection and treatment of domestic household waste from the region of Funen, Denmark Cimpan, Ciprian; Rothmann, Marianne; Wenzel, Henrik Publication date: 2015 Document version: Final published version Document license: Unspecified Citation for pulished version (APA): Cimpan, C., Rothmann, M., & Wenzel, H. (2015). Material flow analysis, carbon footprint and economic assessment of alternative collection and treatment of domestic household waste from the region of Funen, Denmark. Centre for Life Cycle Engineering, SDU. Go to publication entry in University of Southern Denmark's Research Portal Terms of use This work is brought to you by the University of Southern Denmark. Unless otherwise specified it has been shared according to the terms for self-archiving. If no other license is stated, these terms apply: • You may download this work for personal use only. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying this open access version If you believe that this document breaches copyright please contact us providing details and we will investigate your claim. Please direct all enquiries to [email protected] Download date: 10. Oct. 2021 Material flow analysis, carbon footprint and economic assessment of alternative collection and treatment of domestic household waste from the region of Funen, Denmark ISBN 978-87-93413-00-9 Title: Authors: Material flow analysis, carbon footprint and Ciprian Cimpan economic assessment of alternative collection and Marianne Rothmann treatment of domestic household waste from the Henrik Wenzel region of Funen, Denmark Publisher: Centre for Life Cycle Engineering, Faculty of Engineering University of Southern Denmark Campusvej 55 DK-5230 Odense M www.sdu.dk Date: Report no.: 2015-01 2015-10-26 ISBN no.: 978-87-93413-00-9 EAN: 9788793413009 Please cite as: Cimpan C, M Rothmann and H Wenzel. 2015. Material flow analysis, carbon footprint and economic assessment of alternative collection and treatment of domestic household waste from the region of Funen, Denmark. Centre for Life Cycle Engineering, University of Southern Denmark. Report 2015-01. Page 2 of 96 Acknowledgements This project was initiated on the request of Funish waste companies, i.e. Kerteminde Forsyning A/S Odense Renovations A/S Nyborg Forsyning og Service A/S Langeland Forsyning A/S FFV Energi & Miljø A/S Assens Forsyning A/S Vand og Affald, Svendborg Affald A/S and partly financed by these. The work was, further, closely linked to and partly financed by the TOPWASTE project (www.topwaste.dk) and the Energiplan Fyn (www.energiplanfyn.dk) project. We would like to extend our gratitude to these funding parties for giving us the opportunity to conduct this comprehensive study. Page 3 of 96 Executive summary The structure and objectives of the study This work adressed the current and potential (future) efficiency of domestic household waste management in the region of Funen, in terms of material recovery, carbon footprint and economic costs. This report was structured in three parts consisting of: Part 1 contains a comprehensive mapping and characterization of the existing (2013) waste management system in the region of Funen, including waste collection schemes, waste flows and treatment facilities; Part 2 documents the methods used and the results following (1) mass flow modelling of the current and alternative waste management systems designed for the region, and (2) carbon footprint assessment of the modelled systems; Part 3 documents the methods and results following a budget-based economic analysis of systems. The main objective was to assess current practice and to explore potential avenues/strategies which would lead to (1) higher separate collection and recycling rates, and (2) potential climate change savings, while also evaluating the potential costs of new initiatives. A specific focus of this work was to go beyond today ’s background framework conditions and include an assessment of the significance of the changes in backgroung conditions, such as overall Danish policy, strategies and ambitions for future renewable energy integration and climate change mitigation. This implied a modelling of waste management in four background time perspectives: (1) the Present or 2012-2020, (2) Mid-term or 2020-2035, (3) Long-term or 2035-2050, and (4) Beyond 2050. Future energy marginals and prices have high levels of uncertainty, however they do reflect the most likely direction of societal development, as they represent consensus energy policy targets laid out by both the present and the two former Danish governments. The modelled waste management systems consisted of 6 main systems each with 4 variants, for a total of 24 main system designs. These are known as foreground systems. The 6 systems represent the current (2013) system in the region and five alternative systems, which reflect possible changes in separate collection such as the introduction of biowaste and commingled recyclables (dual-stream) collection. The 4 variants of each system are connected to the treatment of remaining residual waste, which was incineration or central sorting (three variations of central sorting). Page 4 of 96 Table 01: Matrix of systems modelled in the assessment; SF= single-family, MF = multi-family Systems Separate collection Treatment of remaining residual waste archetypes WtE: CS-ADwet: CS-ADdry: CS-Biodry: Incineration Central sorting Central sorting Central sorting CHP with wet with dry with biodrying digestion digestion System 0 Existing schemes 0-WtE 0-CS-ADwet 0-CS-ADdry 0-CS-Biodry System 1 Existing schemes + 1-WtE 1-CS-ADwet 1-CS-ADdry 1-CS-Biodry Biowaste SF System 2 Existing schemes + 2-WtE 2-CS-ADwet 2-CS-ADdry 2-CS-Biodry Biowaste SF and MF System 3 Dual-stream 3-WtE 3-CS-ADwet 3-CS-ADdry 3-CS-Biodry System 4 Dual-stream + 4-WtE 4-CS-ADwet 4-CS-ADdry 4-CS-Biodry Biowaste SF System 5 Dual-stream + 5-WtE 5-CS-ADwet 5-CS-ADdry 5-CS-Biodry Biowaste SF and MF The carbon footprint assessment was based on the so-called consequential approach1.This comprises the modelling of system expansion in those cases, where the choice of waste management approach influences adjoining systems. When changing waste management, waste flows are re-directed towards new applications, and this in turn leads to influences on the systems within both energy and agricultural sectors as well as parts of the waste management sectors itself. When, for example, biowaste is seperately collected, one scenario is to model it as co-digested with manure. The influence on the agricultural system in this case can be one of two options: either (1) it attracts more manure to be digested instead of direct spreading on soil (reference manure management), or (2) it replaces other carbon rich substrates for biogas production such as energy crops. Therefore co-digestion is credited with savings from either avoiding the reference manure management or with avoiding the whole production chain for an energy crop. Another example, diversion of waste from incineration plants towards recycling and/or biological treatment liberates incineration capacity, which can be offered on the waste market. Import of combustible waste, already happening in Denmark, implies avoiding the treatment of this waste in the exporting country, which typically is based on disposal operations (landfilling). In the progression of the Danish energy system from now until beyond 2050, biomass plays a role in both electricity, heat and transport fuel production. On the marginal, this biomass is modelled as being imported. But the global biomass marginal is not necessarily as constant, but may well be dynamic/progressing as time goes and global biomass demand increases. In the carbon footprint assessment two different perspectives have, thus, been modelled: (1) a progressive biomass marginal, that reflects an increasing demand for biomass over time and (2) a dirty biomass marginal, which reflects the use of biomass with a high carbon footprint in all four time perspectives. Combined, all 24 foreground system scenarios are assessed against a large variety of background system combinations, resulting in a total of 896 different sets of carbon footprint results. This comprehensiveness was justified by the fact that the nature of the background system is known to be most decisive for the 1 Based on consequential LCA rationale, only processes reacting to the changes implemented in the management system were included, i.e. processes reacting in both the foreground systems and background systems of energy and materials production. This implies modelling of so-called marginal supplies/ marginal data. Page 5 of 96 carbon footprint results and the comparison between alternative foreground systems. By including this many variants of background systems, the study is very robust to any questions and ‘aber dabei’s’. The nature of the results in this way becomes a ‘pattern’ characterizing the differences between compared alternatives under the most probable varying future background conditions, and it supports understanding the robustness of conclusions and the dependency on future developments in background systems. In the economic analysis we took different costing perspectives regarding the utilization chain for biomethane and Refuse Derived Fuel (RDF), respectively. For the biomethane use, we modelled either (1) biomethane combustion with production and sale of heat and electricity, or (2) biomethane direct sale to the gas grid, and for the RDF, we modelled either (3) RDF utilization for CHP or (4) RDF utilization in a “heat only” boiler. Waste management in the region of Funen The geographical scope of the study covers all 10 municipalities in the region, with a total of 486,000 inhabitants. The 226,000 households in the region were devided based on type of residence into single - family (73 %) and respectively multi-family (27 %). The current waste management aproaches in the region bear significant differences with regard to separate collection schemes.
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