| Yardney (GAC) Granular Activated Carbon filtration systems are designed for use where adsorption technology is required for contaminant removal. Yardney granular activated carbon filtration systems utilize the principles of adsorption for the removal of compounds too small for removal with multi-media filtration technology. These automatic systems are extremely effective in removing chlorine and chlorine related compounds, organic chemicals, tastes and odors, halogenated organic compounds, hydrocarbons and other highly dispersed contaminants. Through the use of automatically controlled backwashing, the filter will operate "on-line" for extended periods of time prior to the short backwashing cycle. Automatic filter operation is monitored on both elapsed time as well as pressure differential. When the controller "calls" for a backwash as a result of pressure differential or elapsed time, the backwashing function utilizes a portion of the clean filtered water produced by the system to clean the media. Single tank systems utilize unfiltered water for backwashing. Optional external backwash water sourcing systems are available for both single and multiple tank systems.
The use of granular activated carbon in removing substances from water streams is extremely successful through the adsorption properties of granular activated carbon media. With activated carbon's strong affinity for impurity adsorption, water being processed with activated carbon must be pre-filtered utilizing sand media or multi-media filtration prior to contact with the carbon media to protect the carbon from premature fouling. GAC is a non-selective adsorptive media so to maximize the useful life of the carbon proper and effective pre-filtration to remove suspended solids is critical. Yardney Multi-Media Filters are ideally suited for this purpose.
The Yardney granular activated carbon filtration system utilizes a vertical side shell depth of 72". Yardney granular activated carbon filters feature 3M Scotchkote® 134 fusion bonded epoxy linings, cast iron automatic valves, solid state automatic controls and type 304 stainless steel underdrains. Standard Yardney systems are shipped assembled on structural steel skids for easy installation and start up. Standard inlet and outlet connections are flanged but may be ordered grooved as an option.
Granular activated carbon is available in various grades and types. Selection of the proper carbon media is dependent upon the contaminant to be removed and the specific operating objectives of the system. Granular activated carbon media requires periodic replacement with new carbon as the adsorption capabilities of the carbon are diminished over time and use. Yardney can assist you in the selection of proper carbon media to meet your specific application objectives.
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