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<p>The valorization of agribusiness coproducts is a cornerstone of establishing sustainable, economically viable production chains. This study investigates the production of soy protein concentrate (SPC) with over 60% protein content from high-protein (HiPro) soybean meal through hydroalcoholic extraction, employing a dual experimental and computational approach. Key process variables, including temperature, ethanol-to-water ratio, meal moisture, and solvent addition modes, were evaluated across batch and continuous extraction methods. Experimental results indicated that the extraction batch was inefficient. In contrast, continuous fixed-bed extraction achieved superior results, reaching protein concentrations near 65%. The optimal operating conditions were 70&#xa0;°C with a 1:1 (w/w) ethanol: water solvent ratio in single-addition mode. To evaluate industrial scalability, the process was modeled in Aspen Plus®, showing high agreement with experimental data. Process simulation proved critical for environmental and economic optimization, leading to the design of a solvent recovery system that reduced fresh solvent consumption by 72%. Furthermore, a comprehensive technoeconomic analysis revealed a capital payback period of approximately 1.5&#xa0;years. These findings demonstrate that the proposed continuous extraction process is not only technically superior for SPC2 production but also economically feasible under the evaluated conditions within the circular economy framework.</p> Graphical Abstract <p></p>

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Technoeconomic Evaluation of Soy Protein Concentrate Production from Soybean Meal: From Laboratory to Industrial Scale

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年7月21日

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  • Felipe Augusto Olivo Marcoti,
  • Ana Paula Peron,
  • Humberto Hissashi Takeda,
  • Gideã Taques Tractz,
  • Stênio Cristaldo Heck,
  • Osvaldo Valarini Junior,
  • Stephani Caroline Beneti

摘要

The valorization of agribusiness coproducts is a cornerstone of establishing sustainable, economically viable production chains. This study investigates the production of soy protein concentrate (SPC) with over 60% protein content from high-protein (HiPro) soybean meal through hydroalcoholic extraction, employing a dual experimental and computational approach. Key process variables, including temperature, ethanol-to-water ratio, meal moisture, and solvent addition modes, were evaluated across batch and continuous extraction methods. Experimental results indicated that the extraction batch was inefficient. In contrast, continuous fixed-bed extraction achieved superior results, reaching protein concentrations near 65%. The optimal operating conditions were 70 °C with a 1:1 (w/w) ethanol: water solvent ratio in single-addition mode. To evaluate industrial scalability, the process was modeled in Aspen Plus®, showing high agreement with experimental data. Process simulation proved critical for environmental and economic optimization, leading to the design of a solvent recovery system that reduced fresh solvent consumption by 72%. Furthermore, a comprehensive technoeconomic analysis revealed a capital payback period of approximately 1.5 years. These findings demonstrate that the proposed continuous extraction process is not only technically superior for SPC2 production but also economically feasible under the evaluated conditions within the circular economy framework.

Graphical Abstract