Enabled granular carbon for household filters-How it works
In addition to aeration, granular activated carbon (G.A.C) is an effective treatment for eliminating organic pollutants like VOCs, solvents, PCBs, herbicides , and pesticides. Activated carbon is carbon that has been exposed to very high temperatures, creating a vast network of pores with a very large internal surface area; one gram of activated carbon has the equivalent surface area of a football field. It removes contaminants by adsorption, a process in which dissolved contaminants adhere to the carbon particulate surface.Learn more by visiting Pacific Coast Carbon LLC
G.A.C may be used to replace current media (such as sand) in a traditional container, pool container vessel (domestic use) or used in a separate contactor such as a vertical steel pressure vessel used to carry the activated carbon sheet. The surface of the pores in the G.A.C can no longer adsorb contaminants and the carbon needs to be replaced after a period of a few months or years, depending on the concentration of the pollutants.
The efficiency of granular activated carbon is affected by many operational and maintenance factors. Adsorption sites can be occupied by pollutants in the water, whether or not they are intended for removal. Adsorbed contaminants can also be replaced by other contaminants with which G.A.C has a greater affinity, so that their presence may interfere with the removal of worrying contaminants.
A large drop in the amount of pollutants in inflowing water can cause a GAC filter to desorb, or slough off adsorbed pollutants, as GAC is basically a mechanism of balance. As a result, raw water can produce treated water of unpredictable quality with frequently changing contaminant levels.
A further possible issue is bacterial growth on the oil. Excessive growth of the bacteria can cause higher numbers of bacteria in the treated water. To prevent this issue the disinfection cycle must be closely controlled.
Powdered activated carbon consists of finely round particles, and has the same adsorptive properties as the granular material. In a treatment plant, PAC is usually added to water in a slurry and filtered out instead. Adding PAC can increase the effectiveness of traditional treatment methods in organic removal, and even eliminate tastes and odours.