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A multiple harvest cultivation strategy for ethanol production from sweet sorghum throughout the year in tropical ecosystems

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  • Rolz, Carlos
  • de León, Robert
  • Mendizábal de Montenegro, Ana Luisa
  • Porras, Vilma
  • Cifuentes, Rolando

Abstract

Sweet sorghum is a sugar rich crop that has been considered an alternative feedstock to sugarcane for ethanol production. A full year production cycle is possible as sweet sorghum is capable of multiple harvests. In this work we present experimental results for stalk biomass and sugar productivities, individual sugar distribution at harvest, ethanol yield and productivity of several sweet sorghum varieties and three harvests, the first cut during the rainy period and two ratoon crops during the dry season. The fresh stalk biomass productivity was different among varieties and harvests. All varieties had a lower than expected first harvest productivity, short waterlogging periods during the rainy period might have been the cause, and Top 76-6 showed the best value, 118 Mg per ha. The stalk sugar content dropped drastically for the second ratoon crop which also had an atypical sugar distribution, sucrose content decreased and reducing sugars increased, a premature harvest might have been the possible cause. Umbrella and Top 76-6 had the highest sugar productivity around 10 Mg per ha year. Fructose was the only remaining sugar after fermentation. Top 76-6 showed the highest ethanol productivity of around 4800 L per ha year and the best overall process efficiency.

Suggested Citation

  • Rolz, Carlos & de León, Robert & Mendizábal de Montenegro, Ana Luisa & Porras, Vilma & Cifuentes, Rolando, 2017. "A multiple harvest cultivation strategy for ethanol production from sweet sorghum throughout the year in tropical ecosystems," Renewable Energy, Elsevier, vol. 106(C), pages 103-110.
    • Handle: RePEc:eee:renene:v:106:y:2017:i:c:p:103-110
    DOI: 10.1016/j.renene.2016.12.036
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    References listed on IDEAS

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    1. Larnaudie, Valeria & Rochón, Eloísa & Ferrari, Mario Daniel & Lareo, Claudia, 2016. "Energy evaluation of fuel bioethanol production from sweet sorghum using very high gravity (VHG) conditions," Renewable Energy, Elsevier, vol. 88(C), pages 280-287.
    2. Cutz, L. & Sanchez-Delgado, S. & Ruiz-Rivas, U. & Santana, D., 2013. "Bioenergy production in Central America: Integration of sweet sorghum into sugar mills," Renewable and Sustainable Energy Reviews, Elsevier, vol. 25(C), pages 529-542.
    3. Jonker, J.G.G. & van der Hilst, F. & Junginger, H.M. & Cavalett, O. & Chagas, M.F. & Faaij, A.P.C., 2015. "Outlook for ethanol production costs in Brazil up to 2030, for different biomass crops and industrial technologies," Applied Energy, Elsevier, vol. 147(C), pages 593-610.
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    Cited by:

    1. Xu, Bin & Lin, Boqiang, 2018. "Assessing the development of China's new energy industry," Energy Economics, Elsevier, vol. 70(C), pages 116-131.
    2. Dehghanzad, Mahsa & Shafiei, Marzieh & Karimi, Keikhosro, 2020. "Whole sweet sorghum plant as a promising feedstock for biobutanol production via biorefinery approaches: Techno-economic analysis," Renewable Energy, Elsevier, vol. 158(C), pages 332-342.
    3. Hubert Prask & Małgorzata Fugol & Arkadiusz Dyjakon & Liliana Głąb & Józef Sowiński & Alena Whitaker, 2023. "The Impact of Sewage Sludge-Sweet Sorghum Blends on the Biogas Production for Energy Purposes," Energies, MDPI, vol. 16(5), pages 1-11, February.

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