Fabrication and Control of a Decontamination System with UV-C LED for Garlic (Allium sativum L.) Used in Planting
Abstract
The decontamination process is essential to prevent the proliferation of bacteria that can contaminate food causing loss within the supply chain. Therefore, the objective of the proposal was to manufacture and control a decontamination system that integrates a multilevel conveyor belt and UV-C LED light. The methodology consisted of adapting the automation to the mechanism, through programming based on GEMMA and GRAFCET. A Programmable Logic Controller (PLC) and a Human Machine Interface (HMI) were integrated as control elements. Additionally, different routines were configured such as the speed of the band, height of the lamps, exposure time, emergency stop, and emission of UV-C LED light in each radiation zone. A microbiological count was performed to evaluate the garlic (Allium sativum L.) seed disinfection process, using doses reported in the literature. The results gave evidence that the proposal is a semi-industrial scientific technological product. The levels of the conveyor belt allow the garlic seed to rotate during the disinfection process. With a 92.30 % germicidal effect on aerobic mesophiles, the functioning of the transport and emission mechanisms of the UV-C LED light is adequately taken care of. It can be concluded that the system can be adapted to any product of the agroindustrial sector; the automation can also be extended with the inclusion of more parameters. For future work, it remains to determine the best dose, handling of other products and combinations of UV LED radiation, as well as a more exhaustive microbiological count.
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