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<p>The valorization of food processing residues for renewable bioethanol production contributes to sustainable development and resource recovery. In this study, aronia-derived biomass (ADB), a carbohydrate-rich by-product from aronia juice manufacturing, was utilized as a renewable feedstock through an integrated biorefinery approach. To enhance enzymatic digestibility (ED), alkali pretreatment conditions were optimized using response surface methodology by varying KOH concentration, temperature, and reaction time. The optimized conditions (3% KOH, 75ºC, 3&#xa0;h) significantly improved glucan content from 16.4% to 27.7% and ED from 39.1% to 62.8%, compared to untreated ADB. Subsequent fermentation with <i>Saccharomyces cerevisiae</i> K35 resulted in a bioethanol yield of 95.9% from ADB hydrolysate, comparable to that from commercial glucose. These results highlight the feasibility of integrating mild alkaline pretreatment with enzymatic hydrolysis for bioethanol production from food processing residues. This approach may serve as a promising alternative to conventional acid-based methods, with reduced environmental impact and improved process efficiency.</p>

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Sustainable valorization of aronia-derived biomass for bioethanol production via optimized alkaline pretreatment

  • 期刊论文

  • 发表日期：

    2026年6月29日

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  • Kang Hyun Lee,
  • Jeongho Lee,
  • Seunghee Kim,
  • Hyerim Son,
  • Ho Seok Kwak,
  • Chulhwan Park,
  • Hah Young Yoo

摘要

The valorization of food processing residues for renewable bioethanol production contributes to sustainable development and resource recovery. In this study, aronia-derived biomass (ADB), a carbohydrate-rich by-product from aronia juice manufacturing, was utilized as a renewable feedstock through an integrated biorefinery approach. To enhance enzymatic digestibility (ED), alkali pretreatment conditions were optimized using response surface methodology by varying KOH concentration, temperature, and reaction time. The optimized conditions (3% KOH, 75ºC, 3 h) significantly improved glucan content from 16.4% to 27.7% and ED from 39.1% to 62.8%, compared to untreated ADB. Subsequent fermentation with Saccharomyces cerevisiae K35 resulted in a bioethanol yield of 95.9% from ADB hydrolysate, comparable to that from commercial glucose. These results highlight the feasibility of integrating mild alkaline pretreatment with enzymatic hydrolysis for bioethanol production from food processing residues. This approach may serve as a promising alternative to conventional acid-based methods, with reduced environmental impact and improved process efficiency.