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<p>Surfactants are widely used across industrial and environmental applications but their extensive discharge into aquatic environments raises ecological concerns. Biosurfactants, particularly rhamnolipids (RL) produced by <i>Pseudomonas aeruginosa</i>, represent a sustainable alternative due to their low toxicity, high biodegradability, and superior surface-active properties. Despite these advantages, high production costs remain a major barrier to large-scale implementation. In this study, RL were produced under submerged cultivation using glycerol, soybean oil, and corn bran (CB), a low-cost multifunctional agro-industrial substrate that simultaneously provided nutrients and structural support, resulting in an RL titer of 35&#xa0;g/L. The produced RL consisted predominantly of di-rhamnolipid congeners (96.8%), which are associated with enhanced surface activity and commercial applicability. To further valorize the produced biosurfactant, RL-assisted steam distillation was evaluated as a novel strategy to enhance essential oil extraction. The application of RL increased essential oil recovery by 43%, demonstrating its effectiveness as a process booster. This combined strategy highlights the potential of CB-based RL production and its application in greener, more energy-efficient extraction technologies.</p> Graphical Abstract <p></p>

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Cost-Effective rhamnolipids production from corn Bran and their application in essential oil extraction

  • 期刊论文

  • 发表日期：

    2026年1月3日

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  • Juliana P. Marques Teixeira,
  • Gabriela Dornelas Marques,
  • Michel Pedro Batista,
  • Karen Stefany Conceição,
  • Thaísa Maria da Roda Lino,
  • Natalia Belebecha Terezo,
  • Cesar Augusto Tischer,
  • Alexandre Orsato,
  • Gerson Nakazato,
  • Nicole Caldas Pan,
  • Josiane A. Vignoli,
  • Doumit Camilios-Neto

摘要

Surfactants are widely used across industrial and environmental applications but their extensive discharge into aquatic environments raises ecological concerns. Biosurfactants, particularly rhamnolipids (RL) produced by Pseudomonas aeruginosa, represent a sustainable alternative due to their low toxicity, high biodegradability, and superior surface-active properties. Despite these advantages, high production costs remain a major barrier to large-scale implementation. In this study, RL were produced under submerged cultivation using glycerol, soybean oil, and corn bran (CB), a low-cost multifunctional agro-industrial substrate that simultaneously provided nutrients and structural support, resulting in an RL titer of 35 g/L. The produced RL consisted predominantly of di-rhamnolipid congeners (96.8%), which are associated with enhanced surface activity and commercial applicability. To further valorize the produced biosurfactant, RL-assisted steam distillation was evaluated as a novel strategy to enhance essential oil extraction. The application of RL increased essential oil recovery by 43%, demonstrating its effectiveness as a process booster. This combined strategy highlights the potential of CB-based RL production and its application in greener, more energy-efficient extraction technologies.

Graphical Abstract