Abstract
Introduction
In the last years, the use of biomass for energy purposes has been seen as a promising option to reduce the use of nonrenewable energy sources and the emissions of fossil carbon. However, LCA studies have shown that the energetic use of biomass also causes impacts on climate change and, furthermore, that different environmental issues arise, such as land use and agricultural emissions. While biomass is renewable, it is not an unlimited resource. Its use, to whatever purpose, must therefore be well studied to promote the most efficient option with the least environmental impacts. The 47th LCA Discussion Forum gathered several national and international speakers who provided a broad and qualified view on the topic.
Summary of the topics presented in DF 47
Several aspects of energetic biomass use from a range of projects financed by the Swiss Federal Office of Energy (SFOE) were presented in this Discussion Forum. The first session focused on important aspects of the agricultural biogas production like the use of high energy crops or catch crops as well as the influence of plant size on the environmental performance of biogas. In the second session, other possibilities of biomass treatment like direct combustion, composting, and incineration with municipal waste were presented. Topic of the first afternoon session was the update and harmonization of biomass inventories and the resulting new assessment of biofuels. The short presentations investigated some further aspects of the LCA of bioenergy like the assessment of spatial variation of greenhouse gas (GHG) emissions from bioenergy production in a country, the importance of indirect land use change emissions on the overall results, the assessment of alternative technologies to direct spreading of digestate or the updates of the car operation datasets in ecoinvent.
Conclusions
One main outcome of this Discussion Forum is that bioenergy is not environmentally friendly per se. In many cases, energetic use of biomass allows a reduction of GHG and fossil energy use. However, there is often a tradeoff with other environmental impacts linked to agricultural production like eutrophication or ecotoxicity. Methodological challenges still exist, like the assessment of direct and indirect land use change emissions and their attribution to the bioenergy production, or the influence of heavy metal flows on the bioenergy assessment. Another challenge is the implementation of a life cycle approach in certification or legislation schemes, as shown by the example of the Renewable Energy Directive of the European Union.
Notes
The inventories of this project can be downloaded at www.lc-inventories.ch
The inventories of this project can be downloaded at www.lc-inventories.ch
References
Dauriat A, Gaillard G, Alig M, Scharfy D, Membrez Y, Bachmann N, Steiner R, Charles R, Maltas A, Sinaj S (2011) Analyse de cycle de vie de la production centralisée et décentralisée de biogaz en exploitations agricoles—Rapport final. Auftragnehmer: ENERS Energy Concept. vol Publikation 290493. Bundesamt für Energie BfE, Berne, Switzerland
Dinkel F, Schleiss K, Zschokke M (2012) Ökobilanzen zur Biomasseverwertung. Autragnehmer: Carbotech AG. Publikation 290577. Bundesamt für Energie BFE, Berne, Switzerland
Faist Emmenegger M, Gmünder S, Reinhard J, Zah R, Nemecek T, Schnetzer J, Bauer C, Simons A, Doka G (2012) Harmonisation and extension of the bioenergy inventories and assessment. Draft report. Bundesamt für Energie BFE, Berne, Switzerland
Hayer F, Scharfy D, Gaillard G, Anspach V, Albisser Vögeli G (2011) Ökobilanzierung des Anbaues von Zwischenkulturen zur Biogasproduktion - Schlussbericht. Auftragnehmer: Ernst Basler + Partner AG, Forschungsanstalt Agroscope Reckenholz-Tänikon ART, Arbeitsgemeinschaft zur Förderung des Futterbaues (AGFF), Schweizerischer Bauernverband. Publikation 290518. Bundesamt für Energie BFE, Berne, Switzerland
IPCC (2006) Guidelines for national greenhouse gas inventories. Volume 4: Agriculture, forestry and other land use. Kanagawa, Japan
Itten R, Stucki M, Jungbluth N (2011) Life Cycle Assessment of Burning Different Solid Biomass Substrates - Schlussbericht. Auftragnehmer: ESU-services Ltd., Publikation 290422. Bundesamt für Energie BFE, Bern
Steubing B (2011) Analysis of the availability of bioenergy and assessment of its optimal use from an environmental perspective. Ph.D. thesis, ETHZ, Zurich, Switzerland
Steubing B, Zah R, Ludwig C (2012) Heat, electricity, or transportation? the optimal use of residual and waste biomass in Europe from an environmental perspective. Environ Sci Technol 46(1):164–171
Stucki M, Jungbluth N, Leuenberger M (2012) Life Cycle Assessment of Biogas Production from Different Substrates - Schlussbericht. Auftragnehmer: ESU-Services Ltd., Publikation 290514. Bundesamt für Energie BFE, Berne, Switzerland
Acknowledgments
We thank the speakers for their interesting contributions to this Discussion Forum. We are deeply grateful for the support from the Swiss Federal Office of Energy (SFOE) for the financing of different case studies and supporting the organization of this Discussion Forum. We thank Karin Flury for her contribution to this paper.
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All presentations of the Discussion Forum are available for download at http://www.lcaforum.ch/Downloads/DF47/tabid/94/Default.aspx.
The reports of the cited projects are available for download at http://www.bfe.admin.ch/forschungbiomasse/02390/02720/03175/index.html?lang=de.
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Faist Emmenegger, M., Stucki, M. & Hermle, S. LCA of energetic biomass utilization: actual projects and new developments—April 23, 2012, Berne, Switzerland. Int J Life Cycle Assess 17, 1142–1147 (2012). https://doi.org/10.1007/s11367-012-0483-y
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DOI: https://doi.org/10.1007/s11367-012-0483-y