Life-cycle energy and climate benefits of energy recovery from wastes and biomass residues in the United States


Agricultural and forestry residues, animal manure and municipal solid waste are replenishable and widely available. However, harnessing these heterogeneous and diffuse resources for energy requires a holistic assessment of alternative conversion pathways, taking into account spatial factors. Here, we analyse, from a life-cycle assessment perspective, the potential renewable energy production, net energy gain and greenhouse gas (GHG) emission reduction for each distinct type of waste feedstock under different conversion technology pathways. The utilization of all available wastes and residues in the contiguous United States can generate 3.1–3.8 exajoules (EJ) of renewable energy, but only deliver 2.4–3.2 EJ of net energy gain, and displace 103–178 million tonnes of CO2-equivalent GHG emissions. For any given waste feedstock, looking across all US counties where it is available, except in rare instances, no single conversion pathway simultaneously maximizes renewable energy production, net energy gain and GHG mitigation.

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Fig. 1: Energy, net energy and emissions from waste biomass utilization in the United States.
Fig. 2: Sensitivity analysis of emission estimates.
Fig. 3: County-level renewable energy production, net energy and emissions.

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  1. 1.

    The State of Food and Agriculture 2008. Biofuels: Prospects, Risks and Opportunities (FAO, 2008).

  2. 2.

    Renewables 2017: Global Status Report (REN21, 2017).

  3. 3.

    de Gorter, H., Drabik, D. & Just, D. R. How biofuels policies affect the level of grains and oilseed prices: theory, models and evidence. Glob. Food Secur. 2, 82–88 (2013).

    Google Scholar 

  4. 4.

    To, H. & Grafton, R. Q. Oil prices, biofuels production and food security: past trends and future challenges. Food Secur. 7, 323–336 (2015).

    Google Scholar 

  5. 5.

    Tadasse, G., Algieri, B., Kalkuhl, M. & Von Braun, J. in Food Price Volatility and its Implications for Food Security and Policy 59–82 (Springer, 2016).

  6. 6.

    Hochman, G., Rajagopal, D., Timilsina, G. & Zilberman, D. Quantifying the causes of the global food commodity price crisis. Biomass Bioenerg. 68, 106–114 (2014).

    Google Scholar 

  7. 7.

    Runge, C. F. & Senauer, B. How biofuels could starve the poor. Foreign Aff. 86, 41–53 (2007).

    Google Scholar 

  8. 8.

    Lambin, E. F. & Meyfroidt, P. Global land use change, economic globalization, and the looming land scarcity. Proc. Natl Acad. Sci. USA 108, 3465–3472 (2011).

    Google Scholar 

  9. 9.

    Melillo, J. M. et al. Indirect emissions from biofuels: how important? Science 326, 1397–1399 (2009).

    Google Scholar 

  10. 10.

    Farrell, A. E. et al. Ethanol can contribute to energy and environmental goals. Science 311, 506–508 (2006).

    Google Scholar 

  11. 11.

    Crutzen, P. J., Mosier, A. R., Smith, K. A. & Winiwarter, W. in Paul J. Crutzen: a Pioneer on Atmospheric Chemistry and Climate Change in the Anthropocene (eds Crutzen, P. J. & Brauch, H. G.) 227–238 (Springer, 2016).

  12. 12.

    Rajagopal, D. & Zilberman, D. Environmental, economic and policy aspects of biofuels. Found. Trends Microecon. 4, 353–468 (2008).

    MATH  Google Scholar 

  13. 13.

    Whalen, J. et al. Sustainable biofuel production from forestry, agricultural and waste biomass feedstocks. Appl. Energy 198, 281–283 (2017).

    Google Scholar 

  14. 14.

    Campbell, J. E. & Block, E. Land-use and alternative bioenergy pathways for waste biomass. Environ. Sci. Technol. 44, 8665–8669 (2010).

    Google Scholar 

  15. 15.

    Tonini, D., Hamelin, L., Alvarado-Morales, M. & Astrup, T. F. GHG emission factors for bioelectricity, biomethane, and bioethanol quantified for 24 biomass substrates with consequential life-cycle assessment. Bioresour. Technol. 208, 123–133 (2016).

    Google Scholar 

  16. 16.

    2016 Billion-Ton Report: Advancing Domestic Resources for a Thriving Bioeconomy, Volume 1: Economic Availability of Feedstocks ORNL/TM-2016/160 (US Department of Energy, 2016).

  17. 17.

    Carreras-Sospedra, M., Williams, R. & Dabdub, D. Assessment of the emissions and air quality impacts of biomass and biogas use in California. J. Air Waste Manag. Assoc. 66, 134–150 (2016).

    Google Scholar 

  18. 18.

    Wang, W. & Tao, L. Bio-jet fuel conversion technologies. Renew. Sustain. Energy Rev. 53, 801–822 (2016).

    Google Scholar 

  19. 19.

    de Jong, S. et al. The feasibility of short‐term production strategies for renewable jet fuels—a comprehensive techno‐economic comparison. Biofuels Bioprod. Bioref. 9, 778–800 (2015).

    Google Scholar 

  20. 20.

    de Jong, S. et al. Life-cycle analysis of greenhouse gas emissions from renewable jet fuel production. Biotechnol. Biofuels 10, 64 (2017).

    Google Scholar 

  21. 21.

    Staples, M. D., Malina, R. & Barrett, S. R. The limits of bioenergy for mitigating global life-cycle greenhouse gas emissions from fossil fuels. Nat. Energy 2, 16202 (2017).

    Google Scholar 

  22. 22.

    Sustainable Development Goals: 17 Goals to Transform Our World. United Nations (2018).

  23. 23.

    Geissdoerfer, M., Savaget, P., Bocken, N. M. & Hultink, E. J. The Circular Economy—a new sustainability paradigm? J. Clean. Prod. 143, 757–768 (2017).

    Google Scholar 

  24. 24.

    Stahel, W. R. The circular economy. Nat. News 531, 435 (2016).

    Google Scholar 

  25. 25.

    Liu, W. et al. Economic and life cycle assessments of biomass utilization for bioenergy products. Biofuels Bioprod. Bioref. 11, 633–647 (2017).

    Google Scholar 

  26. 26.

    Laurent, A. & Espinosa, N. Environmental impacts of electricity generation at global, regional and national scales in 1980–2011: what can we learn for future energy planning? Energy Environ. Sci. 8, 689–701 (2015).

    Google Scholar 

  27. 27.

    Aguirre-Villegas, H. A. & Larson, R. A. Evaluating greenhouse gas emissions from dairy manure management practices using survey data and life cycle tools. J. Clean. Prod. 143, 169–179 (2017).

    Google Scholar 

  28. 28.

    Aguirre‐Villegas, H. A., Larson, R. & Reinemann, D. J. From waste‐to‐worth: energy, emissions, and nutrient implications of manure processing pathways. Biofuels Bioprod. Bioref. 8, 770–793 (2014).

    Google Scholar 

  29. 29.

    Banks, C. J., Chesshire, M., Heaven, S. & Arnold, R. Anaerobic digestion of source-segregated domestic food waste: performance assessment by mass and energy balance. Bioresour. Technol. 102, 612–620 (2011).

    Google Scholar 

  30. 30.

    Broun, R. & Sattler, M. A comparison of greenhouse gas emissions and potential electricity recovery from conventional and bioreactor landfills. J. Clean. Prod. 112, 2664–2673 (2016).

    Google Scholar 

  31. 31.

    Macias-Corral, M. et al. Anaerobic digestion of municipal solid waste and agricultural waste and the effect of co-digestion with dairy cow manure. Bioresour. Technol. 99, 8288–8293 (2008).

    Google Scholar 

  32. 32.

    Morris, J. Recycle, bury, or burn wood waste biomass? LCA answer depends on carbon accounting, emissions controls, displaced fuels, and impact costs. J. Ind. Ecol. 21, 844–856 (2017).

    Google Scholar 

  33. 33.

    Nuss, P., Gardner, K. H. & Jambeck, J. R. Comparative life cycle assessment (LCA) of construction and demolition (C&D) derived biomass and US Northeast forest residuals gasification for electricity production. Environ. Sci. Technol. 47, 3463–3471 (2013).

    Google Scholar 

  34. 34.

    Pressley, P. N. et al. Municipal solid waste conversion to transportation fuels: a life-cycle estimation of global warming potential and energy consumption. J. Clean. Prod. 70, 145–153 (2014).

    Google Scholar 

  35. 35.

    Wang, H., Wang, L. & Shahbazi, A. Life cycle assessment of fast pyrolysis of municipal solid waste in North Carolina of USA. J. Clean. Prod. 87, 511–519 (2015).

    Google Scholar 

  36. 36.

    Anex, R. P. et al. Techno-economic comparison of biomass-to-transportation fuels via pyrolysis, gasification, and biochemical pathways. Fuel 89, S35 (2010).

    Google Scholar 

  37. 37.

    Iribarren, D., Peters, J. F. & Dufour, J. Life cycle assessment of transportation fuels from biomass pyrolysis. Fuel 97, 812–821 (2012).

    Google Scholar 

  38. 38.

    Baral, A. & Malins, C. Assessing the Climate Mitigation Potential of Biofuels Derived from Residues and Wastes in the European Context (International Council on Clean Transportation, 2014).

  39. 39.

    Astrup, T., Møller, J. & Fruergaard, T. Incineration and co-combustion of waste: accounting of greenhouse gases and global warming contributions. Waste Manag. Res. 27, 789–799 (2009).

    Google Scholar 

  40. 40.

    Fruergaard, T. & Astrup, T. Optimal utilization of waste-to-energy in an LCA perspective. Waste Manag. 31, 572–582 (2011).

    Google Scholar 

  41. 41.

    Gabra, M., Pettersson, E., Backman, R. & Kjellström, B. Evaluation of cyclone gasifier performance for gasification of sugar cane residue—Part 1: gasification of bagasse. Biomass Bioenerg. 21, 351–369 (2001).

    Google Scholar 

  42. 42.

    Gabra, M., Pettersson, E., Backman, R. & Kjellström, B. Evaluation of cyclone gasifier performance for gasification of sugar cane residue—Part 2: gasification of cane trash. Biomass Bioenerg. 21, 371–380 (2001).

    Google Scholar 

  43. 43.

    Møller, J., Boldrin, A. & Christensen, T. H. Anaerobic digestion and digestate use: accounting of greenhouse gases and global warming contribution. Waste Manag. Res. 27, 813–824 (2009).

    Google Scholar 

  44. 44.

    Swanson, R. M., Platon, A., Satrio, J. A. & Brown, R. C. Techno-economic analysis of biomass-to-liquids production based on gasification. Fuel 89, S19 (2010).

    Google Scholar 

  45. 45.

    Tews, I. J. et al. Biomass Direct Liquefaction Options: TechnoEconomic and Life Cycle Assessment (Pacific Northwest National Laboratory, 2014).

  46. 46.

    July 2017 Monthly Energy Review (US Energy Information Administration, 2017).

  47. 47.

    Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2016 (US Environmental Protection Agency (EPA), 2018).

  48. 48.

    Thornley, P., Gilbert, P., Shackley, S. & Hammond, J. Maximizing the greenhouse gas reductions from biomass: the role of life cycle assessment. Biomass Bioenerg. 81, 35–43 (2015).

    Google Scholar 

  49. 49.

    Phyllis2 Database for Biomass and Waste (Energy Research Centre of the Netherlands, 2017);

  50. 50.

    The Greenhouse Gases, Regulated Emissions, and Energy Use in Transportation (GREET) Model GREET_1_2016 (Argonne National Laboratory, 2016).

  51. 51.

    Williams, R. B., Jenkins, B. M. & Kaffka, S. An Assessment of Biomass Resources in California, 2013 (California Biomass Collaborative, University of California, Davis, 2015).

  52. 52.

    Waste Reduction Model (WARM) Tool User’s Guide version 14 (US EPA, 2016).

  53. 53.

    Cooney, G. et al. Updating the US life cycle GHG petroleum baseline to 2014 with projections to 2040 using open-source engineering-based models. Environ. Sci. Technol. 51, 977–987 (2016).

    Google Scholar 

  54. 54.

    Lee, D., Elgowainy, A. & Dai, Q. Life cycle greenhouse gas emissions of hydrogen fuel production from chlor-alkali processes in the United States. Appl. Energy 217, 467–479 (2018).

    Google Scholar 

  55. 55.

    Ecoinvent Database version 3 (Ecoinvent Centre, 2015);

  56. 56.

    Emissions and Generation Resource Integrated Database (eGRID2016) (US EPA, 2018);

  57. 57.

    The Life Cycle Assessment (LCA) Harmonization Project OpenEI Database (National Renewable Energy Laboratory, 2012);

  58. 58.

    Edenhofer, O. et al. (eds) Renewable Energy Sources and Climate Change Mitigation: Special Report of the Intergovernmental Panel on Climate Change (Cambridge Univ. Press, 2011).

  59. 59.

    Posen, I. D., Griffin, W. M., Matthews, H. S. & Azevedo, I. L. Changing the renewable fuel standard to a renewable material standard: bioethylene case study. Environ. Sci. Technol. 49, 93–102 (2014).

    Google Scholar 

  60. 60.

    Environmental Management—Life Cycle Assessment—Principles and Framework ISO 14040:2006 (International Organization for Standardization, 2006).

  61. 61.

    Sikarwar, V. S. et al. An overview of advances in biomass gasification. Energy Environ. Sci. 9, 2939–2977 (2016).

    Google Scholar 

  62. 62.

    Mu, D., Seager, T., Rao, P. S. & Zhao, F. Comparative life cycle assessment of lignocellulosic ethanol production: biochemical versus thermochemical conversion. Environ. Manag. 46, 565–578 (2010).

    Google Scholar 

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This study would not have been possible without financial support from the UCLA Grand Challenges—Sustainable LA programme.

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D.R. conceived and designed the study, guided data collection, modelling and analysis and co-wrote the manuscript. B.L. contributed to the study design, collected the data, conducted the modelling and analysis and co-wrote the manuscript.

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Correspondence to Deepak Rajagopal.

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Liu, B., Rajagopal, D. Life-cycle energy and climate benefits of energy recovery from wastes and biomass residues in the United States. Nat Energy 4, 700–708 (2019).

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