Investigation of relative humidity distribution and its impact on disinfection using a combination of robotic fogger and hydrogen peroxide

IF 1.8 Q3 INFECTIOUS DISEASES

Infection Prevention in Practice Pub Date : 2025-03-05 DOI:10.1016/j.infpip.2025.100452

Prasanna Kumar Sistla, P. Kanaka Raju

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Abstract

Background

Relative humidity is a key factor in the disinfection process.

Aim

To examine the distribution of relative humidity, and the time required to reach its mean value in the target area when using a robotic fogger with 7.4% hydrogen peroxide.

Methods

The study evaluated the device in both stationary and mobile operation modes. In each mode, relative humidity sensors, along with chemical, biological, and enzyme indicators, were employed to assess the disinfection's effectiveness and consistency.

Results

The device dispersed disinfectant at a rate of 30 mL/min over 45 min in both modes. A shorter time to reach the mean relative humidity is desirable for effective disinfection. It was observed that the mobile mode reached the mean relative humidity 50% faster, maintained this level for an additional 30 min, and achieved an 11% higher relative humidity compared to the stationary mode.