Reduction of Greenhouse Gas Emissions in the Introduction of <i>Inversion System</i> to Produce Sugar and Ethanol from Sugarcane

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  • OHARA Satoshi
    Process Development Laboratories, Asahi Group Holdings, Ltd.
  • KIKUCHI Yasunori
    Presidential Endowed Chair for Platinum Society, Organization for Interdisciplinary Research Project, The University of Tokyo Integrated Research System for Sustainability Science, The University of Tokyo Institutes for Advanced Study Department of Chemical System Engineering, Graduate School of Engineering, The University of Tokyo
  • OUCHIDA Kotaro
    Department of Chemical System Engineering, Graduate School of Engineering, The University of Tokyo
  • SUGIMOTO Akira
    Process Development Laboratories, Asahi Group Holdings, Ltd.
  • HATTORI Taiichiro
    Tanegashima Sugarcane Breeding Site, Kyushu Okinawa Agricultural Research Center, National Agricultural Research Organization
  • YASUHARA Takaomi
    Process Development Laboratories, Asahi Group Holdings, Ltd.
  • FUKUSHIMA Yasuhiro
    Department of Chemical Engineering, Graduate School of Engineering, Tohoku University

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Other Title
  • 砂糖・エタノール逆転型複合生産システムの導入による温室効果ガス排出量削減効果
  • サトウ ・ エタノール ギャクテンガタ フクゴウ セイサン システム ノ ドウニュウ ニ ヨル オンシツ コウカ ガス ハイシュツリョウ サクゲン コウカ
  • Reduction of greenhouse gas emissions in the introduction of inversion system to produce sugar and ethanol from sugarcane

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Abstract

<p>This paper assesses the alternative sugarcane-based industrial systems concerning changes in productivity, the greenhouse gas （GHG） emission intensities of products and the reduction potential of GHG emission compared with the current sugar producing system. The following two systems are assessed; （Case A） Conventionally proposed system to produce ethanol from molasses without changing raw materials and sugar milling processes, （Case B） Inversion system that enhances the production of sugar, ethanol and electricity using a high-yielding sugarcane variety and the Inversion process. As a result, with Case A, ethanol production increased, but electricity output decreased, increasing the direct GHG emissions by 1.3% from the current level while the net GHG emission reduction was estimated to be 0.72 t-CO2-eq./（ha･year） in the overall system. With Case B, the productivity of sugar, ethanol and electricity all increased at the same time. Despite an increase in the GHG emissions by 16.7%, it was estimated that there was a net reduction potential of 1.49 t-CO2-eq./（ha･year） achieved by an enhanced avoided emission. Comparison with the past researches confirmed the validity of the results. The study demonstrated the advantages of the Inversion system in the model area quantitatively.</p>

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