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Expanded Summary -- Controlling Trace Organic Contaminants with GAC Adsorption

  • Author(s): Corwin, Christopher J.; Summers, R. Scott
  • Publications: Journal - American Water Works Association
  • Issue Date: January 2012
  • Volume / Number: 104, Number 1
  • Page(s): 43-44
  • DOI: http://dx.doi.org/10.5942/jawwa.2012.104.0004
  • Product Number: JAW_0076857
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Abstract

Adsorption of trace organic contaminants by granular activated carbon (GAC) was assessed relative to the removal of taste and odor (T&O) compounds and disinfection byproduct (DBP) precursors. Adsorbers operated for control of T&O and DBP precursors were shown to yield good to excellent removal of 17 trace organic contaminant probe compounds. Increasing influent contaminant concentration in the parts-per-billion level led to earlier breakthrough on a mass concentration basis but not on a normalized basis. Increasing background dissolved organic matter concentration led to earlier breakthrough. Optimal empty bed contact time depended on specific treatment objectives and desired contaminant removal level. Series and parallel adsorber operation was calculated to yield a twofold decrease in GAC use rate. The authors present approaches for estimating throughput and use rates based on site-specific data for influent dissolved organic carbon concentration and desired level of trace contaminant removal.

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