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Enhancement of acetone-butanol-ethanol fermentation from eucalyptus hydrolysate with optimized nutrient supplementation through statistical experimental designs

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  • Zheng, Jin
  • Tashiro, Yukihiro
  • Zhao, Tao
  • Wang, Qunhui
  • Sakai, Kenji
  • Sonomoto, Kenji

Abstract

Eucalyptus has been previously suggested as a potential substrate for acetone-butanol-ethanol (ABE) production without nutrient supplementation; however, incomplete sugar consumption has prevented improvement of ABE production. Cellulase loading with 35 FPU g−1 was first optimized in terms of high hydrolysis efficiency (95%). However, only 0.43 g L−1 ABE production and 3.44% glucose consumption rate were achieved. To improve ABE production from eucalyptus hydrolysate, supplementation of 6 nutrients in common tryptone-yeast extract (TY) medium were investigated by statistical approaches. Three nutrients including yeast extract, tryptone, and FeSO4·7H2O were screened as significant nutrients for ABE production. Subsequently, use of a modified TY medium (MTY medium: yeast extract 3.04 g L−1, tryptone 7.64 g L−1, FeSO4·7H2O 15.3 mg L−1), which was subsequently predicted by Plackett-Burman and Box-Behnken designs to stimulate ABE production, resulted in ca. 40-fold increase in ABE concentration (16.9 g L−1) and a glucose consumption rate of 100%. We first examined previously uninvestigated nutrition combinations using Plackett-Burman and Box-Behnken designs for high ABE production from eucalyptus hydrolysate. This study shows that statistical method would be a powerful tool for the optimization and enhancement of ABE production from eucalyptus hydrolysate.

Suggested Citation

  • Zheng, Jin & Tashiro, Yukihiro & Zhao, Tao & Wang, Qunhui & Sakai, Kenji & Sonomoto, Kenji, 2017. "Enhancement of acetone-butanol-ethanol fermentation from eucalyptus hydrolysate with optimized nutrient supplementation through statistical experimental designs," Renewable Energy, Elsevier, vol. 113(C), pages 580-586.
    • Handle: RePEc:eee:renene:v:113:y:2017:i:c:p:580-586
    DOI: 10.1016/j.renene.2017.05.097
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    1. Zheng, Jin & Tashiro, Yukihiro & Wang, Qunhui & Sakai, Kenji & Sonomoto, Kenji, 2015. "Feasibility of acetone–butanol–ethanol fermentation from eucalyptus hydrolysate without nutrients supplementation," Applied Energy, Elsevier, vol. 140(C), pages 113-119.
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    Cited by:

    1. Zhang, Zhicai & Zheng, Huihua & Qian, Jingya, 2023. "Pretreatment with a combination of steam explosion and NaOH increases butanol production of enzymatically hydrolyzed corn stover," Renewable Energy, Elsevier, vol. 203(C), pages 301-311.

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