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<p>Food safety is a critical concern due to its impact on public health, nutrition, and international trade. Mycotoxin contamination, particularly from aflatoxins produced by <i>Aspergillus flavus</i>, poses severe risks, especially in commodities such as red chilli and groundnut, which are highly prone to contamination and widely consumed and exported. Among decontamination strategies, Ultraviolet-C (UV-C) radiation (200–280&#xa0;nm) offers a non-thermal, residue-free, and energy-efficient alternative, inactivating fungal spores and degrading aflatoxins without compromising nutritional quality, unlike chemical or thermal treatments. This study evaluated the effectiveness of UV-C radiation using a double-sided treatment unit at distances and exposure times corresponding to doses of 4065, 8130, and 12,195&#xa0;J/m². Samples were assessed for fungal colony counts, total aflatoxin content, color, and proximate composition. A 15-minute exposure (12195&#xa0;J/m²) achieved a 3-log reduction in <i>A. flavus</i> colonies and degraded over 75% of total aflatoxins, while proximate and color analyses confirmed no adverse effects on nutritional quality. The results highlight the potential of UV-C radiation as an effective, safe, and scalable postharvest treatment, with feasibility for industrial implementation using double-sided units to enhance food safety and compliance with regulatory standards.</p>

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Enhancing safety and quality of red chilli and groundnut through ultraviolet-C (UV-C) radiation for aflatoxin and Aspergillus flavus reduction

  • 期刊论文

  • 发表日期：

    2026年4月17日

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  • Swapna,
  • Udaykumar Nidoni,
  • P. F. Mathad,
  • Sudha Devi,
  • Meenakshi Taduri,
  • Sharanagouda Hiregoudar,
  • Mahadevaswamy

摘要

Food safety is a critical concern due to its impact on public health, nutrition, and international trade. Mycotoxin contamination, particularly from aflatoxins produced by Aspergillus flavus, poses severe risks, especially in commodities such as red chilli and groundnut, which are highly prone to contamination and widely consumed and exported. Among decontamination strategies, Ultraviolet-C (UV-C) radiation (200–280 nm) offers a non-thermal, residue-free, and energy-efficient alternative, inactivating fungal spores and degrading aflatoxins without compromising nutritional quality, unlike chemical or thermal treatments. This study evaluated the effectiveness of UV-C radiation using a double-sided treatment unit at distances and exposure times corresponding to doses of 4065, 8130, and 12,195 J/m². Samples were assessed for fungal colony counts, total aflatoxin content, color, and proximate composition. A 15-minute exposure (12195 J/m²) achieved a 3-log reduction in A. flavus colonies and degraded over 75% of total aflatoxins, while proximate and color analyses confirmed no adverse effects on nutritional quality. The results highlight the potential of UV-C radiation as an effective, safe, and scalable postharvest treatment, with feasibility for industrial implementation using double-sided units to enhance food safety and compliance with regulatory standards.