Revolutionizing Sterilization: A breakthrough mobile vH2O2 decontamination technology

In our fast-changing world, maintaining cleanliness and hygiene has never been more critical. Whether it's personal protective equipment, office supplies, sports gear, or other frequently used items, effective sterilization is essential. Addressing this need, a recent study published in “Scientific Reports” explores an innovative solution: a mobile sterilization station using vaporized hydrogen peroxide (vH₂O₂) and UV-C irradiation. “The Novel Sterilization Device: The Prototype Testing”  by Polish scientists Robert Nowak, Paweł Wityk, Anna Wierzbicka-Woś, Waldemar Gos, and Dorota Kostrzewa-Nowak describes this research.  

Why vH₂O₂ and UV-C?

Traditional sterilization methods like autoclaving, ethylene oxide, X-rays, and gamma rays have their limitations. They can be time-consuming, expensive, and potentially damaging to the materials being sterilized. In contrast, the combination of vH₂O₂ and UV-C irradiation offers several significant advantages:

•    Safety: These methods are safer for both the users and the items being sterilized.
•    Speed: The process is faster, allowing for more frequent and efficient sterilization cycles.
•    Cost-effectiveness: Lower operational costs make it an economical choice.
•    Less destructive: Unlike some methods, vH₂O₂ and UV-C do not harm the materials being sterilized.
•    Less Environmental Impact: These methods do not produce hazardous waste, making them environmentally friendly.

The Prototype

The study describes the development and testing of a working prototype of a mobile sterilization station. This device includes a dry H₂O₂ vapor generator and a system for microbiological verification of log kill, which ensures the effectiveness of the sterilization process. Learn more about condensing vs. dry methods in this white paper on condensation vH₂O₂ bio-decontamination. 

Optimization & testing

To ensure optimal performance, the prototype's use was fine-tuned in terms of temperature, humidity, and treatment time. The Vaisala HPP272 probe measured hydrogen peroxide vapor in ppm, temperature and humidity (as both relative saturation and relative humidity). If needed, the probe could also provide values for dew point, and vapor pressure.  For testing, the items selected for sterilization ranged from common office supplies—such as rulers, set squares, pens, pencils, and keys—to personal protective equipment like masks and helmets. These items were chosen to represent the wide variety of objects that might require sterilization in everyday scenarios.

User-tested, user friendly

One of the notable aspects of this study is the involvement of non-technical end users. These volunteer participants operated the mobile sterilization station, performing several cycles of the sterilization process. This approach ensured that the device is user-friendly and practical for everyday use. The participants were surveyed as part of the research and over 75% believed that the mobile sterilization solution would increase work safety in terms of pathogens. The unit was also with a state fire brigade for three months. This part of the study indicated that the maintenance of the station was easy and did not result in damage to the device. These users found the sterilization process efficient. 

Monitoring & control

To precisely control and monitor the sterilization process, the prototype used Vaisala's HPP272 series probes along with Insight PC software. These tools measured and tracked key parameters, including vH₂O₂ ppm (parts per million), relative humidity, relative saturation, and temperature within the working chamber of the sterilization station. By maintaining optimal conditions, the system ensured effective and consistent sterilization.

Conclusion

The prototype testing detailed in this study marks a significant step forward in sterilization technology. By combining the strengths of vH₂O₂ and UV-C irradiation, this mobile sterilization station offers a safe, efficient, and environmentally friendly solution for a wide range of applications. As we continue to prioritize hygiene and safety, innovations like these will play a crucial role in our daily lives.