Portable PPE Kit Sterilizer Using Ozone UV Sanitization

Download Project Document/Synopsis

PPE kits have played a key role in helping slow down the spread of covid pandemic. PPE’s are used in COVID centers, Hospitals as well as for COVID testing booths. The PPE kits however get infected from the outside and need to be either disposed off or sterilized manually after use using a lot of effort, water and chemicals.
To solve this problem we hereby design a smart PPE kit sterilizer, the size of a half cupboard to sterilize PPE kits without any water or chemicals. The system makes use of dry sterilization to sterilize PPE kits and other infected items for reuse. We here use Ozone gas for sterilization because:

Ozone is a gas that can reach all areas of the ppe kit so that it is sterilized inside out.
Ozone is a proven disinfection and has the ability to disinfect surfaces of bacteria and viruses.

Reference Links: https://www.lenntech.com/library/ozone/comparison/ozone-disinfectants-comparison.htm
https://www.news-medical.net/news/20200709/Ozone-gas-can-provide-a-safe-means-to-disinfect-personal-protective-equipment.aspx
https://www.researchgate.net/publication/342261609_PRELIMINARY_INDICATIONS_FOR_THE_USE_OF_OZONE_AS_AIR_AND_SURFACE_DISINFECTANT_IN_THE_CONJUNCTURE_OF_COVID-19

The system can generate ozone out of air and no need for water or chemicals or any other inputs.

The system makes use of a UV based ozone generator. UV or ultraviolet light (185 to 200nm) can generate ozone gas from air. When air comes in contact with this UV frequency, the oxygen in air is converted to Ozone. The air pulling chamber attached to the sterilizing chamber pulls in air and pushes it through the UV chamber to convert it to ozone and drive this ozone into the sterilizing chamber.
As per the time set by the user the gas is allowed to remain in the sealed sterilizing chamber for disinfection to complete its process. Then when set time is elapsed, it is necessary to convert the qzone to oxygen before releasing it back to air. For this the same uv chamber is also fitted with 254nm UV lights that convert ozone to oxygen. The ozone is then reverse passed through uv chamber this time with a different light frequency to convert it back to oxygen. The system uses ozone sensors in sterilization chamber as well as on outlet valve to check for ozone levels on both sides since ozone is a harmful gas if inhaled in certain quantity.
Note: Ozone is a harmful gas, extreme caution and care is to be taken while using the project kit.
https://www.epa.gov/ground-level-ozone-pollution/ground-level-ozone-basics#:~:text=What%20are%20the%20health%20effects%20of%20ozone%3F&text=Breathing%20ozone%20can%20trigger%20a,leading%20to%20increased%20medical%20care%20.

Machine Size: 35 x 35 x 45 cm