C balance, carbon dioxide emissions and global warming potentials in LCA-modelling of waste management systems
- 7 May 2009
- journal article
- Published by SAGE Publications in Waste Management & Research: The Journal for a Sustainable Circular Economy
- Vol. 27 (8), 707-715
- https://doi.org/10.1177/0734242x08096304
Abstract
Global warming potential (GWP) is an important impact category in life-cycle-assessment modelling of waste management systems. However, accounting of biogenic CO2 emissions and sequestered biogenic carbon in landfills and in soils, amended with compost, is carried out in different ways in reported studies. A simplified model of carbon flows is presented for the waste management system and the surrounding industries, represented by the pulp and paper manufacturing industry, the forestry industry and the energy industry. The model calculated the load of C to the atmosphere, under ideal conditions, for 14 different waste management scenarios under a range of system boundary conditions and a constant consumption of C-product (here assumed to be paper) and energy production within the combined system. Five sets of criteria for assigning GWP indices to waste management systems were applied to the same 14 scenarios and tested for their ability to rank the waste management alternatives reflecting the resulting CO2 load to the atmosphere. Two complete criteria sets were identified yielding fully consistent results; one set considers biogenic CO2 as neutral, the other one did not. The results showed that criteria for assigning global warming contributions are partly linked to the system boundary conditions. While the boundary to the paper industry and the energy industry usually is specified in LCA studies, the boundary to the forestry industry and the interaction between forestry and the energy industry should also be specified and accounted for.Keywords
This publication has 10 references indexed in Scilit:
- Environmental assessment of solid waste landfilling technologies by means of LCA-modelingWaste Management, 2009
- The potential role of compost in reducing greenhouse gasesWaste Management & Research: The Journal for a Sustainable Circular Economy, 2008
- Life cycle assessment of the waste hierarchy – A Danish case study on waste paperWaste Management, 2007
- A comparison of avoided greenhouse gas emissions when using different kinds of wood energyBiomass and Bioenergy, 2006
- International expert group on life cycle assessment for integrated waste management review of 11th meeting, oxford 17th-18th, November 2003The International Journal of Life Cycle Assessment, 2004
- Choices in calculating life cycle emissions of carbon containing gases associated with forest derived biofuelsJournal of Cleaner Production, 2003
- Application of life cycle assessment to the Portuguese pulp and paper industryJournal of Cleaner Production, 2003
- Integrated Solid Waste ManagementPublished by Wiley ,2001
- Key methodological issues for life cycle inventory analysis of paper recyclingJournal of Cleaner Production, 1999
- Towards a standard methodology for greenhouse gas balances of bioenergy systems in comparison with fossil energy systemsBiomass and Bioenergy, 1997