What is Anthracite?
Also known as hard coal, anthracite is a black and shiny variety of coal with a solid and compact physical property. Unlike other types of coal, the highest-ranking of coals with a submetallic shine has the fewest impurities and the highest energy density. The slow process of plant transformation forms the mineral coal over millions of years through the combination of pressure, temperature, and deposited plant layers.
What is the Use of Anthracite?
Anthracite is an outstanding filter media for water purification for drinking water and industrial use, and wastewater treatment due to its ability to attract and absorb impurities from untreated water. The use of anthracite as a filter media enables cleaner water to pass through without reducing the service flow rate compared to sand. Anthracite also allows a faster backwash rate and a reduced pressure drop compared to its counterpart. The mineral coal’s unique density allows it to co-exist with other types of filtration media in a water purification system for better and more efficient treatment of untreated water. Overall, it is one of the best single/dual media filtration used in various designs of water filtration systems today.
Why is Anthracite Better Than Sand?
The mineral coal works better than sand as a filter media because it does not reduce the service flow rate of the filtration system. Additionally, it’s a lot faster to clean and backwash compared to sand. Lastly, anthracite has a slower pressure drop as a filter media compared to sand when used in a filter system.
Is Anthracite Better Than Granular Activated Carbon?
Each filter media has its unique characteristic, which allows it to do a better job in one area while giving an average performance on the other parts of the water purification process. Therefore, choosing the right filter media depends on the hazards you would consider removing from your water source. Water testing is essential to your decision on what grade/type of filtration materials to use in your water purification system.
The area where anthracite is better than activated carbon is the higher service flow rate. Granular activated carbon or GAC has a longer life and does a great job of removing THMs and HAAs from drinking water. However, these filtration media are both excellent in removing impurities despite their differences in characteristics.
What is the Difference Between Anthracite and Granular Activated Carbon?
Anthracite is an excellent filter media used to remove particulate matter from drinking water through the absorption process. Unfortunately, it does a poor job of diffusing the impurities into its pores due to its smaller pores. Backwashing the filter media removes the absorbed impurities.
Granular activated carbon (GAC) acts like a sponge that filters impurities by trapping them in its larger pores. Unlike anthracite, though, backwashing alone won’t remove the impurities absorbed into the pores of the filtration media.
Both anthracite and granular activated carbon provide outstanding filtration results when it comes to eliminating impurities from various water sources. An effective filter system is a combination of different filtration media to enhance the quality of the purification of drinking water.