Design Considerations for a Water Treatment System Utilizing Ultra-Violet Light Emitting Diodes
AIR FORCE INSTITUTE OF TECHNOLOGY WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
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UV LED technology is in its infancy and research as it applies to UV water treatment is required to advance knowledge for practical application. This thesis focused on two subjects. First, the design, fabrication, and operation of a water treatment reaction system utilizing Ultra-Violet UV Light Emitting Diodes LEDs. Second, the measurement of UV LED output angle in water which is necessary to support future reactor designs. Several characteristics of the LED-water interface were revealed which impacted the effectiveness of the vessel including UV dose requirements, LED wavelength, photon dispersion geometry, LED placement, optical efficiency, vessel material, and electronic control system. The reactor vessel design balanced optimal characteristics with experiment design flexibility, fabrication speed, and procurement considerations. Expeditious construction was required to permit laboratory exploration performed by other researchers studying bacterial spore disinfection, an advanced oxidation process, and UV LED output wavelength and intensity observations. Two reactor vessels and three electronic boards were completed and modified as the research matured. Next, the UV LED output angle in air and water was measured. The conclusions of the literature review, practical application, and output angle calculations led to future design considerations for a UV LED, water reaction vessel, and electronic control system.
- Electrooptical and Optoelectronic Devices
- Water Pollution and Control