Simultaneous optimization approach for UV-C radiator to enhance mechanical properties of semi-finished potato tuber (Innovator) for extended storage period

The efficacy of surface treatment technology is highly dependent on the dimensional and operational parameters. UV-C as a commonly used surface treatment technology required fine-tuning to achieve maximum storability of semi-finished products. This study therefore applied a simultaneous optimization approach for the multi-objective function to obtain the best possible combination of variables in the irradiation process (dose (15–45mJ/cm², storage period (3–9d), and distance from the light (40–80 cm)) that offer maintained properties of semi-finished potato tuber for extended storage life. The optimum values are obtained at the ∼40.5mJ/cm², 7 days, and 48 cm granting a 756 N, 6.7 N, and 9 N for compressive, bending, and cutting force resistance, respectively. Further insight into the surface functionality was studied using FT-IR and SEM analysis as a result similar spectral makeup was noted but a shift of absorption peak was observed in the irradiated sample at 30 and 45mJ/cm². Also, a similar granular structure was observed from the morphologies.