Community Research and Development Information Service - CORDIS

Advanced air filtration system

Air filtration systems are widely used as the most effective measures against indoor air pollution that is considered as one of the key highest ranking environmental problems. A newly developed particle filter performs as the commonly used High Efficiency Particulate Air (HEPA) filter does, with less maintenance requirements.
Advanced air filtration system
Originally designed to prevent military workers from radioactive plutonium and other materials, the HEPA filter has been widely used since then as the most common air filtration system. Its normal design allows airflow through its main structure, with microscopic particles being attracted to electrically charged filter materials. In this way, the airflow is improved with airborne hazardous particles being safely removed and protecting people from biological allergens and contaminants, such as viruses, bacteria and dust mites.

This French patented device is based on the HEPA filter operation and it allows a wet electrostatic scrubber-like particle filtering. More specifically, an electro-hydrodynamic atomisation process generates sprays of electrically charged demineralised water droplets that work as collectors. In this way, all airborne microscopic particles both neutral and electrically charged are passing through the sprays and are removed with the aid of the collectors.

The tailored HEPA filter is capable of removing even sub-micron pollutant particles up to 0.1µm in size with an efficiency of at least 99%. Such performance may be accomplished for aerosol flow rates as high as 1m³/h, with a liquid flow rate of approximately 0.0001m³/h. In comparison to HEPA filters, this air filtration system has increased potential for further adjustments to fit under specific requirements. Most importantly, it displays a longer functioning period with minimum maintenance needs.
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