Design of an Arduino-Based System for Disinfection of Rail System Vehicles Using Colloidal Silver Ions with Cold Fogging
In this study, an Arduino-based system was designed to disinfect railway system vehicles using colloidal silver ions. To assess the effectiveness of the designed system, disinfection tests were conducted on coins. The disinfection process was performed using colloidal silver ions at concentrations of 10, 20, and 40 ppm, applied to the surface of coins for 30 seconds, 1 minute, and 2 minutes at each concentration. During the sampling process, all surfaces of the coins were wiped with cotton swabs soaked in maximum recovery dilution (MRD) containing 0.05% sodium thiosulfate. The swabs were rubbed 10 times in both vertical and horizontal directions, and placed in tubes containing 1 ml of MRD. The tubes were vortexed at 3000 rpm for 30 seconds to homogenize the swab and MRD content. A 500 µl aliquot of the homogenized solution was streaked onto Plate Count Agar (PCA) and Blood Agar using the streak plate method. The results of the study demonstrated that colloidal silver ions inhibited microorganisms on the surface of the coins by 90.77% to 100%, depending on the ion concentration and the initial microorganism count, and that the effect was long-lasting.
Keyword: Colloidal Silver Ions; Microbial Inhibition; Arduino-Based System; Disinfection of Rail System
