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<p>The high protein content in cassava leaves offers a promising alternative nitrogen source. Cassava leaves enriched of glutamic acid and aspartic acid which are valuable factors for microbial metabolisms. Biobutanol exhibits superior properties compared to bioethanol, making it an excellent candidate for biofuel applications, and it can be a potential chemical building block that produced from agricultural waste. However, the current production yield remains relatively low. The objective of this study was to enhance biobutanol production using three different nitrogen sources: yeast extract, peptone, and cassava leaf extract (CLE) with <i>Clostridium beijerinckii</i> TISTR 1461. Considering the equivalent amino nitrogen content among the nitrogen sources, the conditions employing CLE and sugarcane bagasse hydrolysate resulted in the maximum biobutanol concentration of 12.0 ± 0.4&#xa0;g/L within a short 42-h period. This result reflects a 200% increase compared to the control and a 130% increase over yeast extract, achieved 24&#xa0;h earlier. The acetone-butanol-ethanol (ABE) productivity, ABE yield, and butanol productivity were recorded at 0.45&#xa0;g/L·h, 0.55&#xa0;g/g, and 0.29&#xa0;g/L·h, respectively. These findings suggest that CLE is a sustainable nitrogen source with substantial potential to boost biobutanol production. Additionally, it promotes the utilization of agricultural waste, thereby contributing to a more sustainable biofuel production process.</p>

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Cassava leaf extract for enhanced biobutanol production from sugarcane bagasse using Clostridium beijerinckii

  • 期刊论文

  • 发表日期：

    2025年2月20日

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  • Nardrapee Karuna,
  • Peraya Buapho,
  • Sirirat Sukphan,
  • Punnita Bootrumka,
  • Thorfun Poolthong,
  • Worapon Kiatkittipong,
  • Phimchanok Jaturapiree

摘要

The high protein content in cassava leaves offers a promising alternative nitrogen source. Cassava leaves enriched of glutamic acid and aspartic acid which are valuable factors for microbial metabolisms. Biobutanol exhibits superior properties compared to bioethanol, making it an excellent candidate for biofuel applications, and it can be a potential chemical building block that produced from agricultural waste. However, the current production yield remains relatively low. The objective of this study was to enhance biobutanol production using three different nitrogen sources: yeast extract, peptone, and cassava leaf extract (CLE) with Clostridium beijerinckii TISTR 1461. Considering the equivalent amino nitrogen content among the nitrogen sources, the conditions employing CLE and sugarcane bagasse hydrolysate resulted in the maximum biobutanol concentration of 12.0 ± 0.4 g/L within a short 42-h period. This result reflects a 200% increase compared to the control and a 130% increase over yeast extract, achieved 24 h earlier. The acetone-butanol-ethanol (ABE) productivity, ABE yield, and butanol productivity were recorded at 0.45 g/L·h, 0.55 g/g, and 0.29 g/L·h, respectively. These findings suggest that CLE is a sustainable nitrogen source with substantial potential to boost biobutanol production. Additionally, it promotes the utilization of agricultural waste, thereby contributing to a more sustainable biofuel production process.