Forest Biomass Supply Chains in Ireland: A Life Cycle Assessment of GHG Emissions and Primary Energy Balances

The demand for wood for energy production in Ireland is predicted to double from 1.5 million m 3 over bark (OB) in 2011 to 3 million m 3 OB by 2020. There is a large potential for additional biomass recovery for energetic purposes from both thinning forest stands and by harvesting of tops and branches, and stumps. This s tudy builds on research within the woodfor-energy concept in Ireland by analysing the ener gy requirements and greenhouse gas emissions associated with thinning, residue bundlin g and stump removal for energy purposes. To date there have been no studies on harvesting of residues and stumps in terms of energy balances and greenhouse gas emissions across the li fe cycle in Ireland. The results of the analysis on wood energy supply chains highlights tr ansport as the most energy and greenhouse gas emissions intensive step in the life cycle. This finding illustrates importance of localised production and use of forest biomass. Production of wood chip, and shredded bundles and stumps, compares favourably with both other sources of biomass in Ireland and fossil fuels.

[1]  T. Ranta,et al.  The Effects of Local Biomass Availability and Possibilities for Truck and Train Transportation on the Greenhouse Gas Emissions of a Small-Diameter Energy Wood Supply Chain , 2012, Bioenergy Research.

[2]  Hans Petersson,et al.  Assessing carbon balance trade-offs between bioenergy and carbon sequestration of stumps at varying time scales and harvest intensities , 2010 .

[3]  S. Grigolato,et al.  Life cycle environmental impact of firewood production - A case study in Italy , 2015 .

[4]  Ambrose Dodoo,et al.  Life cycle primary energy use and carbon footprint of wood-frame conventional and passive houses with biomass-based energy supply , 2013 .

[5]  Tasawar Hayat,et al.  Mercury emissions by Beijing׳s fossil energy consumption: Based on environmentally extended input–output analysis , 2015 .

[6]  T. Nemecek,et al.  Life cycle assessment of Swiss farming systems: I. Integrated and organic farming , 2011 .

[7]  Kevin McDonnell,et al.  Miscanthus production and processing in Ireland: An analysis of energy requirements and environmental impacts , 2013 .

[8]  Leif Gustavsson,et al.  Costs, CO2- and primary energy balances of forest-fuel recovery systems at different forest productivity , 2010 .

[9]  M. Huijbregts,et al.  Handbook on Life Cycle Assessment: Operational Guide to the ISO Standards , 2002 .

[10]  Morgan Fröling,et al.  Energy use indicators in energy and life cycle assessments of biofuels: review and recommendations , 2012 .

[11]  Pietro Goglio,et al.  LCA of cropping systems with different external input levels for energetic purposes. , 2012 .

[12]  Yuri Gerasimov,et al.  Industrial Round-Wood Losses Associated with Harvesting Systems in Russia , 2010 .

[13]  Roger Sathre,et al.  Costs and CO2 benefits of recovering, refining and transporting logging residues for fossil fuel replacement , 2011 .

[14]  S. Berg,et al.  Energy efficiency and the environmental impact of harvesting stumps and logging residues , 2010, European Journal of Forest Research.

[15]  Davide Tonini,et al.  LCA of biomass-based energy systems: A case study for Denmark , 2012 .

[16]  Ger Devlin,et al.  Energy requirements and environmental impacts associated with the production of short rotation willow (Salix sp.) chip in Ireland , 2014 .

[17]  Radomir Klvac.  Pure Energy Ratio of logging residua processing , 2011 .

[18]  Ottar Michelsen,et al.  Environmental Impact and Added Value in Forestry Operations in Norway , 2008 .

[19]  Stefan Muench,et al.  A systematic review of bioenergy life cycle assessments , 2013 .

[20]  Ger Devlin,et al.  Benchmarking Environmental Impacts of Peat Use for Electricity Generation in Ireland—A Life Cycle Assessment , 2015 .

[21]  Hans Rudolf Heinimann,et al.  Life Cycle Assessment (LCA) in Forestry - State and Perspectives , 2012 .

[22]  Brian Tobin,et al.  Biomass expansion factors for Sitka spruce (Picea sitchensis (Bong.) Carr.) in Ireland , 2007, European Journal of Forest Research.

[23]  Leif Gustavsson,et al.  Biofuels from stumps and small roundwood - Costs and CO2 benefits , 2008 .

[24]  Jari Liski,et al.  Indirect carbon dioxide emissions from producing bioenergy from forest harvest residues , 2011 .

[25]  Staffan Berg,et al.  Energy use and environmental impacts of forest operations in Sweden [Journal of Cleaner Production 13 (2005) 33–42] , 2005 .

[26]  Jim Grant,et al.  The distribution and productivity of Sitka spruce (Picea sitchensis) in Ireland in relation to site, soil and climatic factors. , 2009 .

[27]  Margareta Wihersaari,et al.  Greenhouse gas emissions from final harvest fuel chip production in Finland , 2005 .

[28]  Douglas L. Godbold,et al.  Stump Harvesting for Bioenergy - A Review of the Environmental Impacts , 2010 .

[29]  Athanasios Rentizelas.  Biomass supply chains , 2013 .

[30]  Clara Valente,et al.  Bioenergy from mountain forest: a life cycle assessment of the Norwegian woody biomass supply chain , 2011 .

[31]  Ger Devlin,et al.  Energy Regulations: A Case for Peat and Wood Fibre in Ireland. , 2014 .

[32]  Leif Gustavsson,et al.  Time-dependent climate benefits of using forest residues to substitute fossil fuels , 2011 .

[33]  Anthony Halog,et al.  Attributional life cycle assessment of woodchips for bioethanol production , 2011 .

[34]  M. J. Huang,et al.  Comparative techno-economic analysis of biomass fuelled combined heat and power for commercial buildings , 2013 .

[35]  Rodger A. Arola,et al.  Harvesting wood for energy. , 1981 .

[36]  M. Huijbregts,et al.  Is cumulative fossil energy demand a useful indicator for the environmental performance of products? , 2006, Environmental science & technology.

[37]  Hans-Jürgen Dr. Klüppel,et al.  The Revision of ISO Standards 14040-3 - ISO 14040: Environmental management – Life cycle assessment – Principles and framework - ISO 14044: Environmental management – Life cycle assessment – Requirements and guidelines , 2005 .

[38]  Shane Ward,et al.  Energy Audit of Wood Harvesting Systems , 2003 .

[39]  P. D. Kofman,et al.  Harvesting wood for energy. Cost-effective woodfuel supply chains in Irish forestry. , 2011 .

[40]  Eric R. Labelle,et al.  Quantifying the use of brush mats in reducing forwarder peak loads and surface contact pressures. , 2012 .

[41]  Antonio Pizzi,et al.  The influence of forest management systems on the environmental impacts for Douglas-fir production in France. , 2013, The Science of the total environment.

[42]  Darina Hannan.  Renewable energy in Ireland : law, policy and practice , 2001 .

[43]  Dominik Röser,et al.  Sustainability impact assessment of increasing resource use intensity in forest bioenergy production chains , 2011 .

[44]  Ger Devlin,et al.  Fuel efficiency and CO2 emissions of biomass based haulage in Ireland – A case study , 2013 .

[45]  Richard J. Murphy,et al.  Energy and greenhouse gas balance of the use of forest residues for bioenergy production in the UK. , 2011 .

[46]  Per-Anders Hansson,et al.  Greenhouse gas balance of harvesting stumps and logging residues for energy in Sweden , 2011 .

[47]  Lisa Näslund Eriksson,et al.  Comparative analyses of forest fuels in a life cycle perspective with a focus on transport systems , 2008 .

[48]  Radomir Klvac,et al.  Characteristic fuel consumption and exhaust emissions in fully mechanized logging operations , 2009, Journal of Forest Research.

[49]  Sara González-García,et al.  Environmental impacts of forest production and supply of pulpwood: Spanish and Swedish case studies , 2009 .

[50]  Y Aldentun.  Life cycle inventory of forest seedling production — from seed to regeneration site , 2002 .