Solar-Powered UV-LED Module for Water Disinfection on an Off-the-Grid Island


Authors: Bernice Mae Yu Jeco-Espaldon, Achilles E. Espaldon, Tomoyasu Sado, and Kumiko Oguma
Page Range: 135-156
Published in: International Journal of Energy, Environment, and Economics, Volume 30 Issue 2
ISSN: 1054-853X

Table of Contents


Off-the-grid communities face significant challenges in accessing reliable electricity and safe drinking water. To address this, solar-powered UV light emitting diode (UV-LED) systems offer a promising solution, providing low-power water disinfection compatible with solar energy. In this study, we assess the performance of a solar-powered UV-LED water disinfection system on Panobolon Island, a remote off-the-grid location in the Guimaras province, Philippines, where the community heavily relies on groundwater for drinking and household use. Results from island setup tests demonstrate a log inactivation of approximately 1.31 for indigenous E. coli and 1.57 for total coliforms, highlighting the extent of the system’s effectiveness in purifying water. Alongside this, the study also sheds light on other technical challenges linked with the implementation of solar-powered UV-LED systems in such isolated environments. From an economic standpoint, the predicted potential return on investment (ROI) exceeds 300%, making this technology economically viable and sustainable for off-the-grid communities. These findings emphasize the promising impact of solar-powered UV-LED water disinfection systems in addressing waterborne illnesses and improving living conditions in remote areas.

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