{"id":47712,"date":"2021-03-18T13:17:33","date_gmt":"2021-03-18T17:17:33","guid":{"rendered":"https:\/\/seniordesign.digitalscholar.rochester.edu\/ece2021\/?p=80"},"modified":"2022-04-13T11:45:41","modified_gmt":"2022-04-13T15:45:41","slug":"water-sterilizer-control-system","status":"publish","type":"post","link":"https:\/\/www.hajim.rochester.edu\/senior-design-day\/water-sterilizer-control-system\/","title":{"rendered":"Water Sterilizer Control System"},"content":{"rendered":"\n

Description<\/strong><\/h3>\n\n\n\n

Our goal for the project was to utilize UV light to disinfect water in an existing water system. Research have shown that the most effective wavelength range for UV light to deactivate pathogens are 100 nm \u2013 280 nm range, which is known as UV-C. This range damages cells in order to deactivate pathogens rendering them unable to reproduce ridding the water of pathogens. Our system exploits this property of UV-C to create an extension for an existing water system that can sterilize the water as the water is flowing through the pipe. To achieve this goal, we designed our system such that the UV-C bulb being held in a quartz tube is suspended in an aluminum pipe by utilizing 3D designed O-rings. The tube for the UV-C bulb is made from fused quartz which has a transmittance of about 99% for UV-C, and the outer pipe is made from aluminum which has a reflectance of around 80-85%. Ideally this allow for most of the UV-C light to be transmitted to the water with any additional light being reflected off of the aluminum pipe. To achieve the required UV water treatment dosage intensity of at least 40 (mW*sec\/cm2<\/sup>), we control the flow rate of the water with servos fitted on ball valve to ensure that the volume of water flowing through at any point is irradiated properly to deactivate the pathogens.<\/p>\n\n\n\n

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Materials<\/summary>
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