Fast surface disinfection with COUNTERFOG® SDR-F05A+

Abstract

COUNTERFOG® has been proposed as a rapid decontamination and disinfection technology that uses dynamic submicrometric-disinfecting fog cones. When projected onto surfaces, they create a micrometre-thick film of disinfectant minimizing the use of liquids and the impact on environment. The extremely thin film is intended to be enough to cover and kill microorganisms and simultaneously thin enough to evaporate in a few minutes-depending on the environmental conditions. In the present work, experimental tests were carried out to verify this hypothesis. These include a physical characterization of the fog in the cone, a measurement of the liquid flow projected on surfaces as well as disinfection tests with a series of microorganisms. In addition to these results, operational recommendations are derived to ensure disinfection reliability.

Assessment of Surface Disinfection Effectiveness of Decontamination System COUNTERFOG® SDR-F05A+ Against Bacteriophage ɸ29

“…The results obtained in this study complement and extend the ones obtained in Pérez- Díaz et al, 2021 . In this study, some first assays were performed using different microorganisms.…”

“…The smaller they are, the longer they remain suspended in air and it is more difficult to counteract them. This implies that they can only collapse or coalesce with droplets of liquid of a similar size (Pérez- Díaz et al, 2021 ). The fog is projected to the floor or other surfaces, and in the case of infectious agents, it’s essential to disinfect these surfaces.…”

“…This fog will interact with the dispersed agent providing chances for collapsing and neutralization (Pérez-Díaz et al, 2018 ). Suspended particles collapse with the fog nano-sized liquid droplets and are dragged by the cone, posing on the ground or onto surfaces (Pérez-Díaz et al, 2021 ).…”

“…Biological agents can be rapidly eliminated when the fog cones are projected with a disinfectant onto surfaces by covering them with a thin layer of biocide (a few microns thick) (Pérez-Díaz et al, 2021 ).…”

“…Widespread releases of these agents, whether they are chemical, biological, radiological or nuclear (CBRN) can be in the form of intentional dissemination (bioterror attack) or natural outbreak (Wyrzykowska-Ceradini et al, 2019 ). COUNTERFOG® system has been proposed as a rapid decontamination and disinfection technology of both air and surfaces, that uses dynamic submicrometric fog cones (Pérez- Díaz et al, 2021 ). It was designed for collapsing all kinds of dispersed agents using a fog made of a solution that can also contain any kind of neutralizing component (Pérez-Díaz et al, 2018 ; Sánchez García- Casarrubios et al, 2018 ).…”