A Hybrid Model integrating warm heat and ultraviolet germicidal irradiation might efficiently disinfect respirators and personal protective equipment

Banerjee, Rajib; Roy, Pulakesh; Das, Surajeet; Paul, Manash K.

The pandemic coronavirus disease 2019 (COVID-19) has taken a heavy toll on human life and has upended the medical system in many countries. The disease has created a system wide worsening shortage of N95, medical masks, and other personal protective equipment (PPE) that is regularly used by healthcare personnel and emergency service providers for their protection. Considering the number of infected patients and the stressed supplies of PPE reuse of PPE can serve as an efficient contingency plan. Multiple studies have investigated the effect of different decontamination methods. We chose the most user-friendly, easily scalable viral decontamination methods, including ultraviolet (UV) irradiation and heat treatment. In this paper, we investigated a unique approach to reuse the mask by creating a hybrid model that efficiently sanitizes the infected mask. The advantages of the proposed hybrid model as compared to the respective single arms is its decontamination efficacy, operational speed, as well as the number of reuse cycles as verified by mathematical analysis and simulation. This model is mainly intended for medical PPE but can also be used for other domestic and personal sanitization during the COVID-19 pandemic. As per the situation, the hybrid system can be used as standalone systems also. This sanitization process is not only limited to the elimination of SARS-CoV-2 but can be extended to any other infectious agents. Thus, our results indicate that the proposed hybrid system is more effective, meets disinfection criterion and time saving for the reuse of respirators and PPE.