Filter Media

Select Re-Activated carbon from domestic sources is quality screened during our purchasing process for activity, density and fines. The use of re-activated carbon is recommended as a lower cost alternative for most sites where drinking water quality is not necessary. All carbon either sold by itself or installed in our filtration units is traced by lot number to the installation or sale.

Organic removal in liquid and vapor streams
Select virgin carbon from foreign and domestic sources is quality screened during our purchasing process for activity, density and fines. The use of virgin carbon is recommended for sites where drinking water quality is necessary. All carbon either sold by itself or installed in our filtration units is traced by lot number to the installation or sale.

Course solids removal
Crushed anthracite makes an excellent medium density filtration media. Because of its fractured shape, some of the sediment penetrates deeper into the bed. When compared to equivalent filter sands, this means longer filter runs and less head loss. Backwash rates are also reduced.

Anthracite, because of its unique density, can be used in multi-media filters. At 56 lbs./sq. ft. it will hydraulically stratify and remain above heavier media such as filter sand or Manganese Greensand providing a pre-filtration layer.

Birm® is an efficient and economical method of removing dissolved iron and manganese compounds from raw water supplies. It may be either gravity fed or pressurized water treatment systems. Birm® acts as an insoluble catalyst to enhance the reaction between dissolved oxygen and the iron compounds. The physical characteristics of Birm® provide an excellent filter media which is easily cleaned by backwashing to remove the precipitant. Birm® is not consumed in the iron removal operation and therefore offers a tremendous economic advantage over many other iron removal methods.

Birm® is furnished in two grades, regular and fine. Regular is generally recommended for industrial, municipal, and most domestic installations. Fine is recommended on domestic installations where backwash rates are limited. Birm® may also be used for manganese removal with the same dependability as iron removal.

- Oil and Grease removal as well as some metals
EC-100® is a granular, organically modified clay filtration medium for water treatment systems. A blend of bentonite and anthracite treated with a quaternary amine, EC-100® removes mechanically emulsified oil and grease, large molecular weight chlorinated hydrocarbons and heavy metals.

EC-100® used as a pre-treatment to liquid carbon filtration systems can provide longer run times than with carbon alone and therefore decreased operational costs.

Light weight general filter media for suspended solids
Filter Lite granules have irregular surface characteristics affording maximum removal of suspended matter throughout the filter bed. Filter-Lite can be applied to systems designed for either pressure or gravity flow.

Filter Lite has many outstanding advantages over the more common granular filter medias used for suspended solids removal. Because equipment can be smaller, substantial savings can be realized when designing a system using Filter Lite. With lower backwash rates, piping costs and pump costs can also be reduced. Filter Lite typically removes normal suspended solids down to the 20-40 micron range.

Iron and Manganese removal in solution
Manganese Greensand is formulated from a glauconite greensand which is capable of removing iron, manganese, and hydrogen sulfide from water through oxidation and filtration. Soluble iron and manganese are oxidized and precipitated by contact with higher oxides of manganese on the greensand granules. The hydrogen sulfide is eliminated by oxidation to sulfate and an insoluble precipitate. Precipitates are then filtered and removed by backwashing. When the oxidizing capacity power of the Manganese Greensand bed is exhausted, the bed has to be regenerated with a weak potassium permanganate (KMnO4) solution thus restoring the oxidation capacity of the bed.

Two to four ounces of potassium permanganate, in solution, /cu ft. of Manganese Greensand is sufficient for normal regeneration. It is advisable to vigorously backwash and regenerate the bed when it is placed in service and before its oxidation capacity is totally exhausted. To operate the bed after its oxidation capacity is exhausted may reduce its service life.

- Traditional filter media for suspended solids
Filter Sand is a naturally occurring, river washed, glacial deposit products. Its excellent chemical properties - high in silica content and low in soluble calcium, magnesium and iron compounds - meet AWWA-B100-89 specifications. Precision sizing and uniform grading to close limits meet the rigid specifications of professional engineers throughout the United States, Canada and overseas.

Filter Sand is graded specifically for water filtration plants. It can be used in municipal, industrial or residential applications.