PROTOTYPE OF A MEDICAL STERILIZATION DEVICE USING DUAL-MODE UV-C AND OZONE INTEGRATED ON AN ARDUINO-BASED SYSTEM

Abstract

Medical Sterilization Tool Prototype with Dual-Mode UV-C Lightwave and Ozone Integration Based on Arduino Atmega328p and Nextion. This tool also uses a Nextion LCD as a display of test results. In the sterilization process, this tool uses Ozone (O3) and UV-C, and there are two upper and lower chambers. The upper chamber uses ozone, and the lower uses UV-C, which can be used for sterile detection and storage. The sterilization process of medical equipment, such as KN95 masks made of gauze and plastic, can use ozone, while medical equipment such as tweezers made of metal and glass can use UV-C. The main purpose of making a medical equipment sterilizer is to keep instruments safe, organized, and protected from damage or contamination. The design of this tool uses several components of UV-C lamps with 8 watts of power, diy ozone generator, an Arduino Uno ATmega 328p, and a solenoid door lock. The timer test results show an accuracy of 98.79%. Ozone testing every time has a fixed concentration of 50 ppm. Testing the intensity of UV-C lamps is different for every watt. For UV-C, 8 watts has an intensity of 1200μWcm2, UV-C 16 watts has an intensity of 2400μWcm2, UV-C 24 watts has an intensity of 3200 watts. Testing the sterilization results showed a percentage reduction of E. Coli bacteria of 96.67% after being given ozone exposure and 100% after being given UV-C exposure, with each duration of 20 minutes on Endo Agar media. The value of 94% of bacterial colonies on KN95 masks was reduced after being exposed to ozone for 20 minutes, and 98.91% of bacterial colonies on tweezers were reduced after being exposed to 24 watts of UV-C for 20 minutes. Ozone and UV-C are able to kill bacteria with the appropriate time needed.