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Counterfog is a system designed to provide a rapid response for collapsing all kind of air-borne dispersed agents –including Chemical, Biological, Radiological and Nuclear agents as well as solid micro-particles like those in smoke generated by Diesel engines and other non-exhaust traffic particles.

The system was mainly developed for removing CBRN agents from the air in case of a terrorist attack or accidental release. Additionally, it can be also applied to remove contaminating particles responsible for the spread of respiratory diseases in highly polluted cities.

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Main features of Counterfog

The main objective of this project is to build and test a rapid response system for collapsing all kinds of dispersed agents.

Quick Decontamination

Counterfog has proved to be able to remove the noxious small air borne particles, spores, or bacteria in a few minutes. It provides a tool to quickly counteract the dispersion of agents in air.

Droplet Size

One of the secrets is the size of 10 of the drops. These droplets collide with the noxious particles present in air aggregating them
and making them to fall down or to adhere onto surfaces.

Environmentally Friendly

Counterfog is environmental friendly both because of the use of harmless substances and the minimization of waste. Counterfog is totally environmentally friendly, economical and friendly to the health of people.

Potential Impact

The main impact of Counterfog will be the increase of resilience, safety and security against CBRN episodes as well as protection of the environment in CBRN and in fire events. These include natural and accidental and deliberated man-made.

Special Nozzle

Counterfog employs a special nozzle that is supplied with compressed air, drinking water and a disinfectant with which it forms a mist cone with a very particular dynamic capable of capturing and disinfecting contaminants.

This team engineered a nozzle able to provide a very especial fog and a laboratory to test the system under strict ethical, environmental, Health and safety control. At the micron scale particle size and air viscosity are determinant of the whole process. Counterfog water droplets aggregate and remove air borne particles quite efficiently. Counterfog has demonstrated to remove biological aerosols or radiactive particulates from air in the laboratory in less than a minute.

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Biological Decontamination

Counterfog provides a rapid response to contamination by biological agents. It remove biological aerosols or radiactive particulates from air in the laboratory in less than a minute.

This system has been demonstrated in a laboratory with surrogates and simulants through several decontamination tests. The results show a reduction of two to three orders of magnitude. Additionally, other chemical elements such as disinfectants

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