Design of a cold plasma generator for wastewater sanitationBelaj, David (Avtor) Žigon, Jure (Mentor) Goncalves, Jose (Komentor) cold plasmageneratorwastewaterE. ColiB. SubtilisThis thesis investigates the possibility to make a cold plasma generator that would reduce microbial count while being able to process large amounts of wastewater. We used E. coli and B. subtilis as model microorganisms to determine the effect of cold plasma on bacteria. Using two designs, the first being a dielectric barrier discharge (DBD) with a glass vessel to hold the sample, and the second, a stream of liquid flowing through plasma in DBD, we exposed bacteria in liquid media to cold plasma. We then determined the concentration of live bacteria (CFU) by counting colonies on Lysogeny broth (LB) agar plates. Results show 40% average decrease in CFU at 90 s and 63% at 300 s and 600 s of plasma exposure in the first generator and 60% at flow 1 mL/s in the second generator. We calculated volume capacities and energy efficiencies of each generator in different configurations and determined that the second generator at flow rate of 1 mL/s is the best design.20242024-10-02 07:16:24Magistrsko delo/naloga163066VisID: 248103COBISS_ID: 210647043sl