AWWA JAW57534

n order to stay in compliance with recent and upcoming disinfectionbyproduct regulations, many utilities are consideringadvanced treatment processes such as granular activatedcarbon (GAC). However, there is a lack of research concerning thefull-scale performance of GAC and changes in GAC's pore structureafter multiple cycles of water treatment and thermal reactivation.This article examines how the changes in GAC pore structurethat occur after successive reactivations influence adsorption oftotal organic carbon (TOC). The authors show that when implementedprior to chlorination, GAC can proficiently adsorb TOC atfull scale. Further, they show that although GAC's extensiveinternal pore structure is altered, GAC still adsorbs TOC proficientlythrough as many as six cycles of water treatment andthermal reactivation. As regulations become increasingly strict,many utilities may be interested in the long-term "real-world"effectiveness of GAC for removing TOC. Includes 25 references, figures.

Product Details

Edition:

Vol. 95 - No. 2

Published:

02/01/2003

Number of Pages:

10

File Size:

1 file , 280 KB