AWWA ACE95272

Anion exchange resins were evaluated to determine performance characteristics for removing natural organic matter (NOM) from conventionally treated water. The study shows that the tested anion resin effectively removed NOM from lime softened water in south Florida and reduced color levels from 17 to less than 3 color units. Specifically, the anion exchanged resin effectively removed organics in the 1K-10K and greater than 10K molecular weight fractions, rather than less than 1K fraction. No significant degradation in resin performance was observed after 103,000 bed volume (30 cycles) at a loading rate of 2.75 gpm/ft3 (EBCT 2.7 minutes). Based on data collected for spent regenerant water quality, disposal of the regenerant will occur through the municipal sewer system when diluted with backwash water. Disposal of spent regenerant, however, must be investigated on a site-specific basis, as varying conditions can significantly impact the method and cost of disposal. Under the conditions of this study, the anion exchange process is cost effective when added to the existing lime softening treatment facility for color and NOM removal.

Product Details

Published:

01/01/1995

ISBN(s):

089867834X

Number of Pages:

18

File Size:

1 file , 500 KB