Despite safe access to drinking water being recognized by the UN as a basic human right, millions of people around the globe lack adequate supplies, with water-related diseases still being a major cause for mortality, particularly in developing countries. The aim of this study is to test a novel, low-cost solar pasteurisation technology, which has a built-in function to self-regulate according to available sunshine, in order to assess its suitability for safely processing water for drinking purposes. The device, known as a passive solar thermal pasteuriser, can be applied in environments where it is critical to pasteurise the water by reaching sufficient temperatures. A prototype was tested under laboratory conditions, with lamps calibrated to provide representative solar irradiances. Experiments under varying conditions show temperatures as high as 76°C were reached, which according to the literature is sufficient to pasteurise water in less than 5 minutes, providing safe drinking water and eliminating common waterborne pathogens. Future tests and field trials are currently under way to assess microbiological efficiency and improve performance.
Journal of Environmental Research received 50 citations as per Google Scholar report