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Comparing two GACs for adsorption and biostabilization
GAC operated in the adsorption mode removes larger amounts of DBP precursors than does GAC manufactured as a substrate for biological activity, but the former requires frequent regeneration to maintain its high performance.
The removal of organic materials by biological activity is gaining greater attention as regulations become stricter and bacterial regrowth is better understood. This article compares two types of granular activated carbon (GAC) for removing the precursors of disinfection by‐products. One GAC was a coal‐based carbon manufactured as an adsorbent, and the other was a wood‐based carbon manufactured primarily as a substrate for biological activity. After a year‐long pilot‐scale evaluation, the performance of the two GACs was compared. Once the GAC systems had reached a plateau, there was little difference in the performance of the two carbon types; they removed about 15‐20 percent of the precursor material. The GAC manufactured for adsorption, however, removed seven times more total organic carbon than did the other GAC.
Comparing two GACs for adsorption and biostabilization
GAC operated in the adsorption mode removes larger amounts of DBP precursors than does GAC manufactured as a substrate for biological activity, but the former requires frequent regeneration to maintain its high performance.
The removal of organic materials by biological activity is gaining greater attention as regulations become stricter and bacterial regrowth is better understood. This article compares two types of granular activated carbon (GAC) for removing the precursors of disinfection by‐products. One GAC was a coal‐based carbon manufactured as an adsorbent, and the other was a wood‐based carbon manufactured primarily as a substrate for biological activity. After a year‐long pilot‐scale evaluation, the performance of the two GACs was compared. Once the GAC systems had reached a plateau, there was little difference in the performance of the two carbon types; they removed about 15‐20 percent of the precursor material. The GAC manufactured for adsorption, however, removed seven times more total organic carbon than did the other GAC.
Comparing two GACs for adsorption and biostabilization
Carlson, Mark A. (author) / Heffernan, Kevin M. (author) / Ziesemer, Craig C. (author) / Snyder, Edwin G. (author)
Journal ‐ American Water Works Association ; 86 ; 91-102
1994-03-01
12 pages
Article (Journal)
Electronic Resource
English
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