High efficiency air filters (EPA, HEPA and ULPA)

Mycobacterium tuberculosis (MTB) is transmitted through the air, and can be captured on ventilation air filters. People handling these filters may be exposed to infectious material. We studied the survival of strains of Mycobacterium on high efficiency particulate air (HEPA) filter material. We used a model ventilation system to evaluate survival over time of Mycobacterium chelonae and H37Ra (an avirulent stain of MTB) aerosolized and then captured on HEPA filter material. Survival curves for M. chelonae incubated at 55% and 75% RH under static conditions were not different with less than 4% survival at 24 hours. H37Ra was subjected to continuous airflow at the design airflow for the filter material following deposition on the HEPA filter material, and less than 0.1% of cells survived to 48 hours (RH not controlled). H37Ra was resistant to immobilized biocide (trimethoxysilylpropyl dimethyloctadecyl ammonium chloride) on HEPA filter material as well as the same biocide in solution. Finally, survival of H37Ra and virulent MTB strain (H37Rv) were not different following deposition onto HEPA filter material from liquid suspension and incubation under static conditions.

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High-Strength High-Efficiency Particulate Air Filters for Nuclear Applications

Nuclear Technology ◽

10.13182/nt90-a34483 ◽

1990 ◽

Vol 92 (1) ◽

pp. 11-29

Author(s):

Volker Rüdinger ◽

Craig I. Ricketts ◽

Jürgen G. Wilhelm

Keyword(s):

High Efficiency ◽

High Strength ◽

Air Filters ◽

Nuclear Applications

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Removal of Microbe-Carrying Particles by High Efficiency Air Filters in Cleanrooms

International Journal of Ventilation ◽

10.1080/14733315.2012.11683960 ◽

2012 ◽

Vol 10 (4) ◽

pp. 339-351

Author(s):

W. Whyte ◽

G. Green ◽

W. M. Whyte

Keyword(s):

High Efficiency ◽

Air Filters

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Rapid Clogging of High-Efficiency Particulate Air Filters During In-Cell Solvent Fires at Reprocessing Facilities

Nuclear Technology ◽

10.1080/00295450.2019.1620057 ◽

2019 ◽

Vol 206 (1) ◽

pp. 40-47

Author(s):

Takuya Ohno ◽

Shinsuke Tashiro ◽

Yuki Amano ◽

Ryoichiro Yoshida ◽

Hitoshi Abe

Keyword(s):

High Efficiency ◽

Air Filters

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Large-scale preparation of micro-gradient structured sub-micro fibrous membranes with narrow diameter distributions for high-efficiency air purification

Environmental Science Nano ◽

10.1039/c9en00816k ◽

2019 ◽

Vol 6 (12) ◽

pp. 3560-3578 ◽

Cited By ~ 2

Author(s):

Mengjuan Zhou ◽

Mengzhen Fang ◽

Zhenzhen Quan ◽

Hongnan Zhang ◽

Xiaohong Qin ◽

...

Keyword(s):

Free Surface ◽

Large Scale ◽

High Efficiency ◽

Air Purification ◽

Air Filters ◽

Large Scale Preparation ◽

Free Surface Electrospinning ◽

One Step ◽

Scale Preparation ◽

Fibrous Membranes

Micro-gradient structured PAN sub-micro fibrous membrane with high-efficiency air purification performance was fabricated via one-step free surface electrospinning with large-scale yield, firstly demonstrated as air filters.

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Automotive Engine Air Filters Testing on a Specialized Rig Using Controlled Dust Loading

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.809-810.1181 ◽

2015 ◽

Vol 809-810 ◽

pp. 1181-1186 ◽

Cited By ~ 2

Author(s):

Marius Toma ◽

Iordan Fileru

Keyword(s):

High Efficiency ◽

Storage Capacity ◽

Air Filters ◽

Maintenance Activity ◽

Automotive Engine ◽

Dust Loading ◽

Maintenance Activities

In order to better protect the engine, air filters with high efficiency should be used as well as appropriate maintenance activities. Maintenance activity must take into account the behaviour of the air filters during exploitation, namely the increases of the gaso-dynamic resistances they produce while air filters are used. This paper presents the variation of the pressure restriction depending on the amount of dust retained by the air filters and also the storage capacity of dust by the air filters. Filters are loaded on a laboratory rig with dust from the roads of Bucharest.

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