GREENHOUSE GASES EMISSIONS RELATED TO SUGARCANE ETHANOL

Seabra, Joaquim E. A. ; Macedo, Isaías Carvalho ; Leal, Manoel Regis Lima Verde

Resumo:

One of the main objectives of biofuels use is the replacement of fossil fuels, contributing to the reduction of dependency on fossil fuels and mitigation of greenhouse gases (GHG) emissions. But the effectiveness of such substitution depends in the way the biofuel is produced. Since all processing technologies involve direct or indirectly the use of fossil resources, the real benefit of a biofuel depends on the net fossil energy savings resulted from its use, also taking into account the GHG emissions associated to its lifecycle. The environmental advantages of sugarcanebased ethanol, regarding gasoline substitution and GHG emissions mitigation, have been acknowledged since the first comprehensive energy balance and GHG emissions studies were available (Silva et al., 1978; Macedo and Nogueira, 1985; Macedo, 1992). Updating studies have been published since then (Macedo, 1998; Macedo et al., 2004), following the changes in the sugarcane sector and the new parameters for environmental analysis. But the rapid growth of the cane sector in Brazil in the last decade, associated to some legal constraints and technology development are changing important parameters in this evaluation. New cane varieties and productivity, the legal restrictions to sugarcane burning practice and the increased mechanization influence the energy and emissions balance in different ways. Furthermore, cane mills started a strong action in selling electricity surplus, and the use of portion of the cane trash for energy will be seen in the next years.

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DOI: 10.5151/9788521208228-SUGARCANEBIOETHANOL_29

Referências bibliográficas
  • ALLEN, D. E.; KINGSTON, G.; RENNENBERG, H.; DALAL, R. C.; SCHMIDT, S. Effect of nitrogen fertilizer management and waterlogging on nitrous oxide emission from subtropical sugarcane soils. Agriculture, Ecosystems and Environment, 136: 209-217, 2010.
  • WAN, A.; MARINHO, J. P.; TARASANTCHI, R.; BEBER, A.; GIULIANI, E. Environmental sustainability of sugarcane ethanol in Brazil. In: ZUURBIER, P.; Van de VOOREN, J. (Eds.). Sugarcane ethanol, Wageningen Academic Publishers, Wageningen, the Netherlands, pp. 113-138, 2008.
  • BODDEY, R. M. Emissões de gases de efeito estufa na produção de bioetanol da cana-de-açúcar: o que sabemos e que falta saber. Embrapa Agrobiologia, Seropédica, RJ, 2009.
  • CARB. Detailed California-Modified GREET Pathways for Brazilian Sugarcane Ethanol: Average Brazilian Ethanol, With Mechanized Harvesting and Electricity Co-product Credit, With Electricity Co-Product Credit. Stationary Source Division. Release Date: July 20, 2009. Version 2.2.
  • CRUTZEN, P. J.; MOSIER, A. R.; SMITH, K. A.; WINIWARTER, W. N2O release from agro-biofuel production negates global warming reduction by replacing fossil fuels. Atmospheric Chemistry and Physics, 8: 389-395, 2008.
  • DENMEAD, O. T.; MACDONALD, B. C. T.; BRYANT, G.; NAYLOR, T.; WILSON, S.; GRIFFITH, D. W. T.; WANG, W. J.; SALTER, B.; WHITE, I.; MOODY, P. W. Emissions of methane and nitrous oxide from Australian sugarcane soils. Agricultural and Forest Meteorology, doi:10.1016/j.agrformet.2009.06.018, 2009.
  • DIRECTIVE 2009/28/EC of the European Parliament and of the Council, of 23 April 2009, on the promotion of the use of energy from renewable sources and amending and subsequently repealing Directives 2001/77/EC and 2003/30/EC. Official Journal of the European Union; L140/16; 05.06.2009.
  • EPA. Renewable Fuel Standard Program (RFS2) Regulatory Impact Analysis. Assessment and Standards Division, Office of Transportation and Air Quality, U. S. Environmental Protection Agency. EPA-420-R-10-006, February 2010.
  • EPE. Plano Nacional de Energia 2030. Empresa de Planejamento Energético, MME, 2007.
  • MACEDO, I. C. The sugarcane agro-industry and its contribution to reducing CO2 emissions in Brazil. Biomass and Bioenergy, 3 (2): 77-80, 1992.
  • MACEDO, I. C. Greenhouse gas emissions and energy balances in bio-ethanol production and utilization in Brazil (1996). Biomass and Bioenergy, 14 (1): 77-81, 1998.
  • MACEDO, I. C.; HORTA NOGUEIRA, L. A. Balanço de energia na produção de açúcar e álcool nas usinas cooperadas. Boletim Técnico Copersucar, v. 31/85, 1985.
  • MACEDO, I. C.; LEAL, M. R. L. V.; DA SILVA, J. E. A. R. Balanço das emissões de gases do efeito estufa na produção e no uso do etanol no Brasil. Secretaria do Meio Ambiente, Governo de São Paulo. 19 pp + anexos. Abril de 2004.
  • MACEDO, I. C.; SEABRA, J. E. A.; SILVA, J. E. A. R. Greenhouse gases emissions in the production and use of ethanol from sugarcane in Brazil: the 2005/2006 averages and a prediction for 2020. Biomass and Bioenergy, 32: 582-595, 2008.
  • MEIRA FILHO, L. G.; MACEDO, I. C. Etanol e mudança do clima: a contribuição para o PNMC e as metas para o pós-Kyoto. Versão preliminar. UNICA, São Paulo, Brasil, 2009.  NASSAR, A. M.; RUDOR, B. F. T.; ANTONIAZZI, L. B.; ALVES DE AGUIAR, D.; BACCHI, M. R. P.; ADAMI, M. Prospects of the sugarcane expansion in Brazil: impacts on direct and indirect land use changes. In: ZUURBIER, P.; Van de VOOREN, J. (Eds.) Sugarcane ethanol, Wageningen Academic Publishers, Wageningen, the Netherlands, pp. 63-93, 2008.
  • RFA. Carbon and Sustainability Reporting Within the Renewable Transport Fuel Obligation: Technical Guidance Part Two Carbon Reporting – Default Values and Fuel Chains. Office of the Renewable Fuels Agency, V1.3. August 2008.
  • SEABRA, J. E. A. Avaliação técnico-econômica de opções para o aproveitamento integral da biomassa de cana no Brasil. Campinas, Faculdade de Engenharia Mecânica, Universidade Estadual de Campinas, Tese de Doutorado, 273 p., 2008.
  • SILVA, J. G.; SERRA, G. E.; MOREIRA, J. R.; GONÇALVES, J. C.; GOLDEMBERG, J. Energy balance for ethyl alcohol production from crops. Science, 201 (4359): 903-906, 8 September 1978.
  • SOUZA, E. L.; MACEDO, I. C. (Coord). Etanol e Bioeletricidade: a cana-de-açúcar no futuro da matriz energética. União da Indústria da Cana-de-açúcar, São Paulo, Brasil, 2009.
Como citar:

SEABRA, Joaquim E. A.; MACEDO, Isaías Carvalho; LEAL, Manoel Regis Lima Verde; "GREENHOUSE GASES EMISSIONS RELATED TO SUGARCANE ETHANOL", p. 291-300. Sugarcane bioethanol — R&D for Productivity and Sustainability. São Paulo: Blucher, None.
ISBN: 9788521208228, DOI 10.5151/9788521208228-SUGARCANEBIOETHANOL_29