Disinfection of Water for Human Consumption in Rural Communities of Peru Using a UV-C LED Prototype

Currently, significant challenges exist regarding both the quantity and quality of water, especially in rural areas of Peru where access to potable water is limited. This study aims to address these issues by implementing a UVC-LED system for the disinfection of water intended for human consumption in rural Peruvian communities. The research was conducted in three stages: (1) characterization of the microbiological status of water from the rural district of Querulpa Chico-Aplao; (2) development of a disinfection prototype based on UVC-LED technology; and (3) application of this UVC-LED system to disinfect water used for human consumption in the study area. Preliminary results from the microbiological analysis revealed that water consumed by the population of Querulpa Chico is contaminated with total coliforms. Specifically, measurements at two sampling points reported 3 and 4 Most Probable Number (MPN) units, respectively. These values exceed the regulatory limit of 0 MPN for potable water. Regarding the disinfection system, tracer tests and mathematical model indicated a retention time of 240 seconds. The system employs 17 UVC-LEDs, each with an optical output power of 11.5 mW. Disinfection trials using water samples from Querulpa Chico are ongoing. The outcomes of this study aim to contribute to the development of effective, low-cost disinfection solutions to ensure safe drinking water for rural populations in Peru.