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<p>Vinasse sludge from pisco production represents a growing waste management challenge due to its high organic load, suspended solids, and microbial content. Despite the widespread application of ultrasound (US) and ozone (O₃) as advanced oxidation processes in wastewater treatment, no study has evaluated their combined application for the disinfection and valorisation of vinasse sludge. This work provides the first systematic assessment of US, O₃, and US/O₃ treatments applied to chitosan-flocculated pisco vinasse sludge, demonstrating synergistic effects on microbial inactivation and revealing significant compositional transformations relevant to its downstream valorisation as a protein-enriched material. The combined US/O₃ process achieved complete removal of total culturable bacteria (TCB) within 30&#xa0;min, outperforming O₃ alone (95.8% in 45&#xa0;min) and US alone (44.3% in 60&#xa0;min). Sonoluminescence was actinometrically quantified, yielding a mean radiant power of 1.23 × 10⁻⁴ J/s, confirming the generation of in situ UV irradiation within the opaque sludge matrix. Most notably, the US/O₃ treatment more than doubled crude protein content and increased lipid content. These results demonstrate that US/O₃ treatment simultaneously ensures microbiological safety and enhances the nutritional profile of vinasse sludge, opening concrete pathways for its valorisation as a protein-enriched biomaterial.</p>

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Ultrasound-Ozone Treatment Enables Simultaneous Disinfection and Protein Enrichment of Pisco Vinasse Sludge

  • 期刊论文

  • 发表日期：

    2026年8月4日

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  • Rodrigo Poblete,
  • Agustín Olivares,
  • Jacqueline Poblete,
  • Rainer Nordenflycht,
  • Alejandra Gallegos,
  • Issis Quispe

摘要

Vinasse sludge from pisco production represents a growing waste management challenge due to its high organic load, suspended solids, and microbial content. Despite the widespread application of ultrasound (US) and ozone (O₃) as advanced oxidation processes in wastewater treatment, no study has evaluated their combined application for the disinfection and valorisation of vinasse sludge. This work provides the first systematic assessment of US, O₃, and US/O₃ treatments applied to chitosan-flocculated pisco vinasse sludge, demonstrating synergistic effects on microbial inactivation and revealing significant compositional transformations relevant to its downstream valorisation as a protein-enriched material. The combined US/O₃ process achieved complete removal of total culturable bacteria (TCB) within 30 min, outperforming O₃ alone (95.8% in 45 min) and US alone (44.3% in 60 min). Sonoluminescence was actinometrically quantified, yielding a mean radiant power of 1.23 × 10⁻⁴ J/s, confirming the generation of in situ UV irradiation within the opaque sludge matrix. Most notably, the US/O₃ treatment more than doubled crude protein content and increased lipid content. These results demonstrate that US/O₃ treatment simultaneously ensures microbiological safety and enhances the nutritional profile of vinasse sludge, opening concrete pathways for its valorisation as a protein-enriched biomaterial.