In previous posts, we have discussed about carbon filter, its features and applications for various purposes. In this article, we will exclusively see carbon filter application for water purification industry.
A filter having granular activated carbon (GAC) is an established alternative to eliminate certain chemicals, mainly organic chemicals, from water. Carbon filters also can be applied to eliminate chemicals that give offensive odors or tastes to water like hydrogen sulfide (rotten eggs odor) and chlorine. Nevertheless, other chemicals, such as iron and nitrate, are not captured by the carbon and are not eliminated and another type of filter, like reverse osmosis (RO) or green sand might be required. These filters will also eliminate certain organic chemicals.
It is extremely vital that the kind and concentration of contaminants, and standard water use, be known in order to find out the right size and components of the system. All treatment systems need proper installation and episodic maintenance. Eventually, the capability of the carbon filter to bind and eliminate chemicals is used up and it needs to be changed. How often the carbon filter should be changed must be based on pollutant levels and water use. While some filters might last for numerous years if contaminant levels and/or water use are low, higher levels or use might need more recurrent change-outs.
A whole-house carbon filter is installed at a point on the home’s water supply plumbing that leads to treatment of all water that flows to any faucet or fixture in the home (but normally will leave out outside faucets to extend the life of the carbon). It eliminates the chemicals before they can be ingested, breathed in, or absorbed by the skin during bathing or washing. The filters are typically cylindrical in shape and heavily used in small and medium scale households.