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CENTAUR® 12x40 is a liquid phase virgin activated carbon that has been manufactured to develop catalytic functionality. The product is unique in that it concentrates reactants via adsorption and then promotes their reaction on the surface of the pores. CENTAUR 12x40 is produced from bituminous coal using a patented process. Although it is not impregnated with metals or alkali, it displays the catalytic functionality of these materials. In most cases, it can be reactivated and does not present the disposal concerns associated with impregnated carbons.

Granular Carbon: How it works

Granular activated carbon removes dissolved organic pollutants from water by a process called adsorption. As water passes through the porous granules of activated carbon, molecules of the organic pollutants are attracted to the surface of the pores and are held there by weak physical forces. The phenomenon is somewhat similar to iron filings being held by a weak magnet.

The ability of granular activated carbon to remove large quantities of organic impurities is a function of its highly developed internal pore structure. This unique pore structure is created during the manufacturing process, which involves the crushing and thermal "activation" of select grades of bituminous coal under carefully controlled conditions. As a result of this processing, an extensive network of pores is created inside each carbon granule, providing an enormous internal surface area (calculated to be about 1,000 square meters per gram).

Granular activated carbon's great porosity is responsible for its high capacity for trapping and holding organic molecules. For example, just one pound of carbon granules has an effective total (external and internal) surface area equal to that of a 150-acre farm. A single handful of activated carbon has a total surface area equal to that of a football field. Multiply the surface area of that farm or football field by the amount of carbon inside a water treatment facility, and some idea of the magnitude of activated carbon's adsorptive capacity for organic contaminants may be readily obtained.

Unlike other water treatment materials, granular activated carbon will not be discarded after being saturated with organic wastes. After the carbons' capacity for adsorbing organic impurities is used up, the granules will be restored to their original adsorptive capacity through "re-activation" in a multiple-hearth furnace.

Reactivation is simply the restoration of the carbon's ability to adsorb impurities from water. This restoration of carbon's adsorption capacity is accomplished as the carbon passes through the high-temperature, multiple-hearth furnace at temperatures as high as 1800° Fahrenheit. As the carbon passes from hearth to hearth in the furnace, the organic impurities are burned from the internal surfaces of the individual carbon granules.

The red hot carbon is discharged from the furnace into a water quench tank where it is cooled and then transported in a water stream to a storage tank, ready for reuse.

More than 90 percent of the original carbon is recovered in the reactivation process. Fresh carbon is added to the water treatment system to compensate for the small losses resulting from reactivation and handling of the carbon.

Learn more about the toxins in your water

• Volatile Organic Compounds (VOC's)
• Household-cleaning compounds, industrial wastes insecticides
• Trihalomethanes
• Microbiological Organisms

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Learn more about Carbon Absorption Applications

REMOVES CHEMICALS & ORGANICS- Granular activated carbon is the most widely known method of removing contaminants and cleaning up water. G.A. C. has been studied by several engineering firms and has been found to be successful at removing the following organic chemicals.

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