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Filtration

Filtration

Filtration is a physical separation process that involves passing a suspension through a porous medium to separate solids from fluids. During filtration, solids collect on the porous medium while liquids, also collectively known as the filtrate, pass through. The filtration medium is selected based on the filtration purpose, quantity, and nature of the precipitate. The general criteria for a suitable filtering medium are that it is inert, mechanically strong, nonabsorbent toward dissolved...

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The evolution and impact of testing baghouse filter performance.

Minh Pham¹, Christina Clark, John Mckenna

¹South Coast Air Quality Management District, Diamond Bar CA, USA 2ETS, Incorporated, Roanoke, VA, USA.

Journal of the Air & Waste Management Association (1995)

|August 25, 2012

Summary

The Environmental Technology Verification (ETV) program verifies filtration media for removing fine particulate matter (PM2.5) from pulse-jet baghouses. Using verified media is encouraged by regulatory agencies to improve environmental protection and public health.

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Area of Science:

Environmental Science
Chemical Engineering
Air Pollution Control

Background:

The US Environmental Protection Agency (EPA) established the Environmental Technology Verification (ETV) program in 1995.
The ETV program aims to provide independent and credible performance verification of innovative environmental technologies.
This verification accelerates market acceptance of products that benefit the environment and public health.

Purpose of the Study:

To outline the evolution of standard test methods for filtration media used in pulse-jet baghouses.
To discuss regulatory activities by the EPA and the South Coast Air Quality Management District (SCAQMD).
To highlight the benefits of using verified filtration media and its importance in baghouse operations.

Main Methods:

Development of a testing protocol under the ETV program to verify the performance of filtration products for removing fine particulate matter (PM2.5).
This protocol served as the basis for American Society for Testing and Materials (ASTM) Method D6830-02 and International Organization for Standardization (ISO) Method 11057.
Review of regulatory encouragement and the integration of filter performance testing into baghouse management.

Main Results:

A standardized testing protocol for baghouse filtration media has been established and adopted by ASTM and ISO.
Regulatory bodies like the EPA and SCAQMD strongly recommend the use of ETV/ASTM-verified filtration media.
Verified media contributes to improved removal of PM2.5, enhancing environmental and public health outcomes.

Conclusions:

The ETV program and subsequent standard methods provide a reliable means to assess filtration media performance.
Adoption of verified filtration media is encouraged by key regulatory agencies.
Integrating filter performance testing into baghouse permitting and O&M plans is crucial for effective air pollution control.