Reliable monitoring UV-C irradiation of a specific LED system for application in extending the postharvest life of bananas

Thi-Thu-Ngoc Le; Chung-Ta Liao; Chi-Shou Wu; Shih-Kang Lin; Tsung-Hsun Yang; Yeh-Wei Yu; Ching-Cherng Sun

doi:10.1117/12.2675903

2 October 2023 Reliable monitoring UV-C irradiation of a specific LED system for application in extending the postharvest life of bananas

Thi-Thu-Ngoc Le, Chung-Ta Liao, Chi-Shou Wu, Shih-Kang Lin, Tsung-Hsun Yang, Yeh-Wei Yu, Ching-Cherng Sun

Author Affiliations +

Proceedings Volume 12666, Current Developments in Lens Design and Optical Engineering XXIV; 126660D (2023) https://doi.org/10.1117/12.2675903
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

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Abstract

Antifungal effects of ultraviolet C (UV-C) irradiation have been considered a potential solution to reduce the severity of black spots on postharvest fruits. In this work, a 30 × 30 × 30 cm system was made based on UV-C light-emitting diodes (LEDs) to apply in reducing disease symptoms for bananas which could be used in industrial conveyor belts. The UV-C irradiance monitoring was carefully carried out for several sections at various box heights in simulation and measurement. The findings experienced a dominating range of 6 to 9 W/m² in the central sections. Regarding in vivo conditions, the observation after a week from experiment showed that the disease symptoms on the UVC-treated banana peel, which was exposed under UV-C light around 5 s, dramatically decreased compared to a natural banana. Consequently, the UV-C dose range is proposed from 0.030 to 0.045 kJ/m² with minimum damage in terms of sensory properties. Owing to the flexible shape and short exposure time, the system promises to provide many potential applications to prolong the quality of bananas.

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Thi-Thu-Ngoc Le, Chung-Ta Liao, Chi-Shou Wu, Shih-Kang Lin, Tsung-Hsun Yang, Yeh-Wei Yu, and Ching-Cherng Sun "Reliable monitoring UV-C irradiation of a specific LED system for application in extending the postharvest life of bananas", Proc. SPIE 12666, Current Developments in Lens Design and Optical Engineering XXIV, 126660D (2 October 2023); https://doi.org/10.1117/12.2675903

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