This Is AuburnElectronic Theses and Dissertations

Salt and Light Water Purification System




Ewing, Emile

Type of Degree



Electrical Engineering


The need for a proposed solution to help mitigate the world’s water crisis is presented. This need is not a new development in the 21st century, nor is the process of using electricity and chemicals to sanitize water. However, a unique way to meet this need using sunlight and sodium chloride is considered new and explored in this document. The Salt and Light Water Purification System is low cost and reliable. The system targets third-world countries. Field testing in Uganda has determined these systems meet the need for inexpensive and effective water purification. Basic electrolysis is carried out utilizing two titanium rods coated with a rare earth oxide to react sodium and chlorine atoms in water. The electrolytic reactions create free chlorine sources including sodium hypochlorite, hypochlorous acid, and dissolved chlorine gas. The electrical, biological, and chemical aspects of the entire process are detailed, as are the reasons for choosing each of the components for this system. Results from experimental testing are provided and explained in conjunction with the reason for this particular design. A conclusion captures the future vision for this system.