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Cassava stem wastes as potential feedstock for fuel ethanol production: A basic parameter study

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  • Wei, Maogui
  • Zhu, Wanbin
  • Xie, Guanghui
  • Lestander, Torbjörn A.
  • Xiong, Shaojun

Abstract

The cassava stem is found to be one of few crop residues containing starch (up to 42% of dry mass) that may be converted to fuel ethanol. The current study was to evaluate the influence of parameters genotype, growth location and harvest time on cassava stem starch contents and yields as well as consequences in ethanol production (non-cellulosic process), based on 180 samples from a full factorial design experiment (3 varieties × 3 locations × 5 harvest times) in Guangxi, China. The potential utilization of stem starch and soluble sugar that varied 14–42% and 3–12.1% of dry mass, respectively, can correspond to an increase of 26% in ethanol production compared to that produced by roots only. The cassava stem starch content was significantly affected by all three studied parameters and location had the largest effect followed by variety and harvest time, while the stem starch yield was significantly affected by location only. The starch and soluble sugar content were significantly correlated with soil properties, e.g., soil pH and organic carbon, S and P contents. A general and positive correlation was also found between the stem and root starch, suggesting a promising potential of using stem starch without reducing root starch production.

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  • Wei, Maogui & Zhu, Wanbin & Xie, Guanghui & Lestander, Torbjörn A. & Xiong, Shaojun, 2015. "Cassava stem wastes as potential feedstock for fuel ethanol production: A basic parameter study," Renewable Energy, Elsevier, vol. 83(C), pages 970-978.
    • Handle: RePEc:eee:renene:v:83:y:2015:i:c:p:970-978
    DOI: 10.1016/j.renene.2015.05.054
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    References listed on IDEAS

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    1. Xiong, Shaojun & Zhang, Yufen & Zhuo, Yue & Lestander, Torbjörn & Geladi, Paul, 2010. "Variations in fuel characteristics of corn (Zea mays) stovers: General spatial patterns and relationships to soil properties," Renewable Energy, Elsevier, vol. 35(6), pages 1185-1191.
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    1. Veiga, João Paulo Soto & Valle, Teresa Losada & Feltran, José Carlos & Bizzo, Waldir Antonio, 2016. "Characterization and productivity of cassava waste and its use as an energy source," Renewable Energy, Elsevier, vol. 93(C), pages 691-699.
    2. Ozoegwu, C.G. & Eze, C. & Onwosi, C.O. & Mgbemene, C.A. & Ozor, P.A., 2017. "Biomass and bioenergy potential of cassava waste in Nigeria: Estimations based partly on rural-level garri processing case studies," Renewable and Sustainable Energy Reviews, Elsevier, vol. 72(C), pages 625-638.
    3. Kanoksilapatham, Wirojne & Ogawa, Makoto & Intagun, Weeranut, 2020. "Effects of clay and temperature on the slag formation of two biomass fuels: Wood from Acacia mangium and rhizome residual from Manihot esculenta," Renewable Energy, Elsevier, vol. 156(C), pages 213-219.

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