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  • Filter Media Overview

    Anthracite

    The anthracite coal used for filtration is primarily mined in Northeast Pennsylvania.  Anthracite is a harder and cleaner than bituminous coal making it an ideal component in filtration configurations.  (Bituminous coal is commonly used for the manufacture of activated carbon.)

    See Anthracite filter media safety data sheet

     

    Birm™

    Birm™ is one of several medias which reduce iron and manganese.  Birm acts as the catalyst to enhance the reaction between dissolved oxygen and iron compounds.  This oxidative reaction changes soluble iron (clear water iron) Fe++ to Fe+++, insoluble iron.  It produces ferric hydroxide which precipitates and is easily filtered.

    See Birm filter media product manual

    Under the right conditions, there are no chemicals required for maintenance and regeneration is not required.  Iron removal efficiency is very high, only periodic backwashing is required and it has a long life and wide temperature range.

    However, like other iron removal medias, Birm™ is not a “one size fits all”.  The manufacturer notes the following operating conditions prior to applying:

     

    Georgia Marble

    Neutralization of drinking water with pH values lower than 7 is critical to consumer health.  Low pH water can cause potential leaching of copper, lead and other metals.   Homeowners should be aware of greenish stain in ceramic bowls caused by copper piping.  The EPA banned lead solder in 1986.  Homes built prior to 1986 may have exposure to lead compounds in solder or drinking water fixtures.  Since copper piping is not easily replaced, neutralization of low pH water is imperative.

    Georgia Marble is a brand name for high quality, potable water grade calcium carbonate.  Calcium carbonate increases the pH of acidic water.  The chief advantage of the Georgia Marble neutralizing media is its ability to dissolve slowly and not overcorrect the pH.

    See Calcite filter media product manual

     

    Corosex® (Magnesium Oxide)

    “Mag Oxide”, on a per weight basis, can neutralize five times more acidity than calcium carbonate.  It is combined with Georgia Marble (calcium carbonate) in applications where the starting pH is lower than 5.5.

    See Corosex filter media product manual

    The combination of the two is generally referred to as “Low pH Mix” and comes in a variety of ratios.

     

    Filter Ag®

    Filter-Ag® is silica, crystalline quartz media.  It is commonly used in sediment filters for the reduction of suspended solids down to the 20-40-micron range.  Filter-Ag® filters can be positioned ahead of softeners.

    See Filter Ag filter media product manual

    It is also very good at trapping the fragile iron flock that forms after soluble or dissolved iron is oxidized via aeration, ozonation and chlorination.

    Filter Ag Plus®

    Filter Ag Plus® is clinoptilolite, an environmentally friendly, all-natural media.  When used in deep bed filtration Filter Ag Plus® can reduce suspended solids down to 5 microns or less.

    GreensandPlus

    GreensandPlus is a proven technology for iron, manganese, hydrogen sulfide, and arsenic removal.  GreensandPlus is an exact replacement for Manganese Greensand.

    See GreensandPlus filter media technical data sheet

    Unlike Greensand, GreensandPlus can regenerated with chlorine, not just potassium permanganate.

    Intermittent Regeneration (Regenerate, place in service) Point of Entry Residential Applications

    Continuous Regeneration – Municipal Applications

     

    Pyrolox® Advantage

    Pyrolox®

    Pyrolox® media is effective for the reduction of iron, manganese and hydrogen sulfide.

    See Pyrolox filter media technical guide sheet

    Regular backwashing is essential for long-term success.

    Sand/Gravel

    Sand is believed to have been the first filtration media.  For water treatment filtration, it must be washed, graded and certified for potable water use.   Silica sand from New Jersey is shipped world-wide.  Its sub-angular form is conducive to superior filtration.

    KDF55/KDF85

    KDF® Media are high-purity copper-zinc granules.  The REDOX, (exchange of electrons), reaction removes chlorine, hydrogen sulfide, soluble heavy metals and microorganisms from water.

    See KDF filter media technical bulletin

    See KDF filter media specification brochure

    MTM®

    MTM® reduces iron, manganese and hydrogen sulfide. It has a lightweight core with a coating of manganese dioxide.    It is like GreensandPlus because it is regenerated with chlorine or potassium permanganate but it is lighter in weight.

    See MTM filter media product manual

    Continuous or intermittent regenerations are required to maintain its oxidizing capacity.