GAC Testing Services 

  • Granular Activated Carbon (GAC) composition and RSSCT testing, i.e., Total Organic Carbon (TOC), 2-methylisoborneol (MIB)
  • Determination of carbon usage rate and remaining filter/adsorber life
  • Disinfection Byproducts
  • Carbon specifications:
    • Tannin value
    • Phenol value
    • Iodine number
    • BET surface area
    • Pore volume
    • Pore size distribution
    • Carbon hardness and abrasion
    • Determination of carbon usage rate and remaining filter/adsorber life
  • Breakthrough curves for compounds of interest (e.g., Total Organic Carbon, 2-methylisoborneol, geosmin, methyl tert-butyl ether, etc.)
granular activated carbon services

What is Rapid Small Scale Column Testing? 

Rapid Small Scale Column Tests (RSSCTs) scale down the conditions and dimensions of a full scale filter bed with GAC and allow
continuous flow (using client-provided water) until breakthrough of the granular activated carbon. This test was initially developed for evaluating organic compound removal on activated carbon. Bench scale setup is derived using hydrodynamics and mass transport equations,
and has been shown to be very effective in indicating accurate breakthrough curves for granular activated carbon. Our service allows you to compare the performance of several GACs for particular contaminants or predict the bed-life of a GAC in the full-scale facility. You can know
your granular activated carbon usage rate and remaining filter/adsorber life in days, not months.
Engineering Performance Solutions uses RSSCTs to predict months of full scale data in days with very low water requirements. One particular area of concern in water treatment where RSSCTs can be useful is in the control of disinfection by-products (DBPs). EPS can not only compare the removal efficiencies of DBP precursors, but effluents from the columns can be dosed with chlorine and the formation of trihalomethanes (THMs) and haloacetic acids (HAAs) monitored over time. We can predict removal for any of the common contaminants listed to the right, or design a custom test for your facility.

Common Surface and 
Ground Water Contaminants

· MIB, geosmin (tastes and odors)
· Natural Organic Matter (NOM)
· Disinfection By-Products (DBPs)
· Synthetic Organic Compounds (SOCs) (e.g. TCE, PCE)
· Perchlorate
· Pesticides
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