Filter Aids
Filter aids are materials added to the fluid to improve the filtration process.
They can prevent clogging, improve flow rates, and enhance the clarity of the filtrate.
Common filter aids include:
Diatomaceous Earth: Made from fossilized remains of diatoms, used in fine filtration.
Perlite: A volcanic glass material that expands and is used as a filter aid.
Cellulose: Used for its fibrous structure to improve filtration.
Activated Carbon: Used for adsorptive filtration to remove dissolved impurities.
Filter Media
The filter medium is the material through which the fluid passes during filtration.
Different types of filter media include:
Cloth Filters: Made from natural or synthetic fibers, used in various industrial applications.
Paper Filters: Commonly used for laboratory filtrations, like filter papers.
Membrane Filters: Used for precise filtration, available in various pore sizes for microfiltration, ultrafiltration, and nanofiltration.
Sand Filters: Common in water treatment processes, using layers of graded sand.
Ceramic Filters: Used for high-temperature and chemical-resistant applications.
Metal Filters: Made from woven or sintered metal, used in high-pressure and high-temperature applications.